1253613621 has 8 divisors (see below), whose sum is σ = 1800060640. Its totient is φ = 771454512.

The previous prime is 1253613607. The next prime is 1253613679. The reversal of 1253613621 is 1263163521.

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

It is not a de Polignac number, because 1253613621 - 2²⁹ = 716742709 is a prime.

It is a super-2 number, since 2×1253613621² = 3143094221513463282, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1253613121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16071931 + ... + 16072008.

It is an arithmetic number, because the mean of its divisors is an integer number (225007580).

Almost surely, 2^1253613621 is an apocalyptic number.

It is an amenable number.

1253613621 is a deficient number, since it is larger than the sum of its proper divisors (546447019).

1253613621 is a wasteful number, since it uses less digits than its factorization.

1253613621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32143955.

The product of its digits is 6480, while the sum is 30.

The square root of 1253613621 is about 35406.4064965650. The cubic root of 1253613621 is about 1078.2543877211.

The spelling of 1253613621 in words is "one billion, two hundred fifty-three million, six hundred thirteen thousand, six hundred twenty-one".