1015904742241 has 3 divisors (see below), whose sum is σ = 1015905750163. Its totient is φ = 1015903734320.

The previous prime is 1015904742169. The next prime is 1015904742247. The reversal of 1015904742241 is 1422474095101.

The square root of 1015904742241 is 1007921.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 984220742241 + 31684000000 = 992079^2 + 178000^2 .

It is not a de Polignac number, because 1015904742241 - 2⁷ = 1015904742113 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1015904742194 and 1015904742203.

It is not an unprimeable number, because it can be changed into a prime (1015904742247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 503961 + ... + 1511881.

Almost surely, 2^{1015904742241} is an apocalyptic number.

1015904742241 is the 1007921-st square number.

1015904742241 is the 503961-st centered octagonal number.

It is an amenable number.

1015904742241 is a deficient number, since it is larger than the sum of its proper divisors (1007922).

1015904742241 is an frugal number, since it uses more digits than its factorization.

1015904742241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2015842 (or 1007921 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 40.

The spelling of 1015904742241 in words is "one trillion, fifteen billion, nine hundred four million, seven hundred forty-two thousand, two hundred forty-one".