1125612780601 has 3 divisors (see below), whose sum is σ = 1125613841551. Its totient is φ = 1125611719652.

The previous prime is 1125612780541. The next prime is 1125612780631. The reversal of 1125612780601 is 1060872165211.

The square root of 1125612780601 is 1060949.

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., 1125404844201 + 207936400 = 1060851^2 + 14420^2 .

It is not a de Polignac number, because 1125612780601 - 2⁷ = 1125612780473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1125612780631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 530475 + ... + 1591423.

Almost surely, 2^{1125612780601} is an apocalyptic number.

1125612780601 is the 1060949-th square number.

1125612780601 is the 530475-th centered octagonal number.

It is an amenable number.

1125612780601 is a deficient number, since it is larger than the sum of its proper divisors (1060950).

1125612780601 is an frugal number, since it uses more digits than its factorization.

1125612780601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2121898 (or 1060949 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 40.

The spelling of 1125612780601 in words is "one trillion, one hundred twenty-five billion, six hundred twelve million, seven hundred eighty thousand, six hundred one".