1255938621 has 16 divisors (see below), whose sum is σ = 1997021184. Its totient is φ = 686475504.

The previous prime is 1255938617. The next prime is 1255938659. The reversal of 1255938621 is 1268395521.

1255938621 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1255938621 - 2² = 1255938617 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1255938611) 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, 1299661 + ... + 1300626.

It is an arithmetic number, because the mean of its divisors is an integer number (124813824).

Almost surely, 2^1255938621 is an apocalyptic number.

It is an amenable number.

1255938621 is a deficient number, since it is larger than the sum of its proper divisors (741082563).

1255938621 is a wasteful number, since it uses less digits than its factorization.

1255938621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2600320.

The product of its digits is 129600, while the sum is 42.

The square root of 1255938621 is about 35439.2243284189. The cubic root of 1255938621 is about 1078.9205667258.

The spelling of 1255938621 in words is "one billion, two hundred fifty-five million, nine hundred thirty-eight thousand, six hundred twenty-one".