1015401243 has 8 divisors (see below), whose sum is σ = 1354714128. Its totient is φ = 676511264.

The previous prime is 1015401229. The next prime is 1015401253. The reversal of 1015401243 is 3421045101.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1015401243 - 2⁴ = 1015401227 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1015401223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100080 + ... + 109757.

It is an arithmetic number, because the mean of its divisors is an integer number (169339266).

Almost surely, 2^1015401243 is an apocalyptic number.

1015401243 is a deficient number, since it is larger than the sum of its proper divisors (339312885).

1015401243 is a wasteful number, since it uses less digits than its factorization.

1015401243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211453.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 1015401243 is about 31865.3611779311. The cubic root of 1015401243 is about 1005.1076155150.

Adding to 1015401243 its reverse (3421045101), we get a palindrome (4436446344).

The spelling of 1015401243 in words is "one billion, fifteen million, four hundred one thousand, two hundred forty-three".