1265551442 has 8 divisors (see below), whose sum is σ = 1898567856. Its totient is φ = 632695492.

The previous prime is 1265551403. The next prime is 1265551549. The reversal of 1265551442 is 2441555621.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17948 + ... + 53415.

It is an arithmetic number, because the mean of its divisors is an integer number (237320982).

Almost surely, 2^1265551442 is an apocalyptic number.

1265551442 is a deficient number, since it is larger than the sum of its proper divisors (633016414).

1265551442 is an equidigital number, since it uses as much as digits as its factorization.

1265551442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80232.

The product of its digits is 48000, while the sum is 35.

The square root of 1265551442 is about 35574.5898360051. The cubic root of 1265551442 is about 1081.6662214739. Note that the first 3 decimals are identical.

The spelling of 1265551442 in words is "one billion, two hundred sixty-five million, five hundred fifty-one thousand, four hundred forty-two".