1253711655 has 64 divisors (see below), whose sum is σ = 2606545920. Its totient is φ = 559778688.

The previous prime is 1253711639. The next prime is 1253711677. The reversal of 1253711655 is 5561173521.

It is a happy number.

1253711655 is a `hidden beast` number, since 1 + 2 + 537 + 116 + 5 + 5 = 666.

It is not a de Polignac number, because 1253711655 - 2⁴ = 1253711639 is a prime.

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 63 ways as a sum of consecutive naturals, for example, 25209 + ... + 56061.

It is an arithmetic number, because the mean of its divisors is an integer number (40727280).

Almost surely, 2^1253711655 is an apocalyptic number.

1253711655 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1253711655 is an abundant number, since it is smaller than the sum of its proper divisors (1352834265).

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

1253711655 is a wasteful number, since it uses less digits than its factorization.

1253711655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30917 (or 30911 counting only the distinct ones).

The product of its digits is 31500, while the sum is 36.

The square root of 1253711655 is about 35407.7908799744. The cubic root of 1253711655 is about 1078.2824938918.

The spelling of 1253711655 in words is "one billion, two hundred fifty-three million, seven hundred eleven thousand, six hundred fifty-five".