1251525930 has 16 divisors (see below), whose sum is σ = 3003662304. Its totient is φ = 333740240.

The previous prime is 1251525871. The next prime is 1251525937. The reversal of 1251525930 is 395251521.

It is a junction number, because it is equal to n+sod(n) for n = 1251525891 and 1251525900.

It is not an unprimeable number, because it can be changed into a prime (1251525937) 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, 20858736 + ... + 20858795.

It is an arithmetic number, because the mean of its divisors is an integer number (187728894).

Almost surely, 2^1251525930 is an apocalyptic number.

1251525930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1251525930 is an abundant number, since it is smaller than the sum of its proper divisors (1752136374).

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

1251525930 is a wasteful number, since it uses less digits than its factorization.

1251525930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41717541.

The product of its (nonzero) digits is 13500, while the sum is 33.

The square root of 1251525930 is about 35376.9123864704. The cubic root of 1251525930 is about 1077.6555023085.

The spelling of 1251525930 in words is "one billion, two hundred fifty-one million, five hundred twenty-five thousand, nine hundred thirty".