1252200621 has 16 divisors (see below), whose sum is σ = 1909051904. Its totient is φ = 715191984.

The previous prime is 1252200617. The next prime is 1252200623. The reversal of 1252200621 is 1260022521.

It is a happy number.

It is not a de Polignac number, because 1252200621 - 2² = 1252200617 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1252200623) 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 15 ways as a sum of consecutive naturals, for example, 32730 + ... + 59796.

It is an arithmetic number, because the mean of its divisors is an integer number (119315744).

Almost surely, 2^1252200621 is an apocalyptic number.

It is an amenable number.

1252200621 is a deficient number, since it is larger than the sum of its proper divisors (656851283).

1252200621 is a wasteful number, since it uses less digits than its factorization.

1252200621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29280.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 1252200621 is about 35386.4468546928. The cubic root of 1252200621 is about 1077.8491203110.

The spelling of 1252200621 in words is "one billion, two hundred fifty-two million, two hundred thousand, six hundred twenty-one".