1257272653 has 16 divisors (see below), whose sum is σ = 1558560640. Its totient is φ = 987598656.

The previous prime is 1257272633. The next prime is 1257272663. The reversal of 1257272653 is 3562727521.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1257272653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1257272603) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37050 + ... + 62347.

It is an arithmetic number, because the mean of its divisors is an integer number (97410040).

Almost surely, 2^1257272653 is an apocalyptic number.

1257272653 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1257272653 is a deficient number, since it is larger than the sum of its proper divisors (301287987).

1257272653 is a wasteful number, since it uses less digits than its factorization.

1257272653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99556.

The product of its digits is 176400, while the sum is 40.

The square root of 1257272653 is about 35458.0407383149. The cubic root of 1257272653 is about 1079.3024339165.

The spelling of 1257272653 in words is "one billion, two hundred fifty-seven million, two hundred seventy-two thousand, six hundred fifty-three".