1265494342 has 16 divisors (see below), whose sum is σ = 2169914112. Its totient is φ = 542230920.

The previous prime is 1265494319. The next prime is 1265494361. The reversal of 1265494342 is 2434945621.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1265494295 and 1265494304.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 81193 + ... + 95515.

It is an arithmetic number, because the mean of its divisors is an integer number (135619632).

Almost surely, 2^1265494342 is an apocalyptic number.

1265494342 is a deficient number, since it is larger than the sum of its proper divisors (904419770).

1265494342 is a wasteful number, since it uses less digits than its factorization.

1265494342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20643.

The product of its digits is 207360, while the sum is 40.

The square root of 1265494342 is about 35573.7872878332. The cubic root of 1265494342 is about 1081.6499534482.

The spelling of 1265494342 in words is "one billion, two hundred sixty-five million, four hundred ninety-four thousand, three hundred forty-two".