1252252100 has 36 divisors (see below), whose sum is σ = 2964424848. Its totient is φ = 455364000.

The previous prime is 1252252093. The next prime is 1252252123. The reversal of 1252252100 is 12522521.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 568106 + ... + 570305.

Almost surely, 2^1252252100 is an apocalyptic number.

1252252100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1252252100 is an abundant number, since it is smaller than the sum of its proper divisors (1712172748).

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

1252252100 is a wasteful number, since it uses less digits than its factorization.

1252252100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1138436 (or 1138429 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 1252252100 is about 35387.1742302208. The cubic root of 1252252100 is about 1077.8638905306.

Adding to 1252252100 its reverse (12522521), we get a palindrome (1264774621).

1252252100 divided by its reverse (12522521) gives a square (100 = 10²).

It can be divided in two parts, 1252 and 252100, that added together give a palindrome (253352).

The spelling of 1252252100 in words is "one billion, two hundred fifty-two million, two hundred fifty-two thousand, one hundred".