1265115442 has 4 divisors (see below), whose sum is σ = 1897673166. Its totient is φ = 632557720.

The previous prime is 1265115409. The next prime is 1265115457. The reversal of 1265115442 is 2445115621.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1181228161 + 83887281 = 34369^2 + 9159^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 316278859 + ... + 316278862.

Almost surely, 2^1265115442 is an apocalyptic number.

1265115442 is a deficient number, since it is larger than the sum of its proper divisors (632557724).

1265115442 is an equidigital number, since it uses as much as digits as its factorization.

1265115442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 632557723.

The product of its digits is 9600, while the sum is 31.

The square root of 1265115442 is about 35568.4613386635. The cubic root of 1265115442 is about 1081.5419908749.

The spelling of 1265115442 in words is "one billion, two hundred sixty-five million, one hundred fifteen thousand, four hundred forty-two".