1252545100 has 18 divisors (see below), whose sum is σ = 2718023084. Its totient is φ = 501018000.

The previous prime is 1252545097. The next prime is 1252545139. The reversal of 1252545100 is 15452521.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6262626 + ... + 6262825.

Almost surely, 2^1252545100 is an apocalyptic number.

1252545100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1252545100 is an abundant number, since it is smaller than the sum of its proper divisors (1465477984).

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

1252545100 is a wasteful number, since it uses less digits than its factorization.

1252545100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12525465 (or 12525458 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 25.

The square root of 1252545100 is about 35391.3139060985. The cubic root of 1252545100 is about 1077.9479496142.

Adding to 1252545100 its reverse (15452521), we get a palindrome (1267997621).

The spelling of 1252545100 in words is "one billion, two hundred fifty-two million, five hundred forty-five thousand, one hundred".