1265253942 has 8 divisors (see below), whose sum is σ = 2530507896. Its totient is φ = 421751312.

The previous prime is 1265253863. The next prime is 1265253971. The reversal of 1265253942 is 2493525621.

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

1265253942 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 1265253942.

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 3 ways as a sum of consecutive naturals, for example, 105437823 + ... + 105437834.

It is an arithmetic number, because the mean of its divisors is an integer number (316313487).

Almost surely, 2^1265253942 is an apocalyptic number.

1265253942 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1265253942 is a wasteful number, since it uses less digits than its factorization.

1265253942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210875662.

The product of its digits is 129600, while the sum is 39.

The square root of 1265253942 is about 35570.4082349360. The cubic root of 1265253942 is about 1081.5814571283.

The spelling of 1265253942 in words is "one billion, two hundred sixty-five million, two hundred fifty-three thousand, nine hundred forty-two".