125421510 has 32 divisors (see below), whose sum is σ = 302141952. Its totient is φ = 33320160.

The previous prime is 125421469. The next prime is 125421511. The reversal of 125421510 is 15124521.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125421511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 417 + ... + 15843.

It is an arithmetic number, because the mean of its divisors is an integer number (9441936).

Almost surely, 2^125421510 is an apocalyptic number.

125421510 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

125421510 is an abundant number, since it is smaller than the sum of its proper divisors (176720442).

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

125421510 is a wasteful number, since it uses less digits than its factorization.

125421510 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15708.

The product of its (nonzero) digits is 400, while the sum is 21.

The square root of 125421510 is about 11199.1745231512. The cubic root of 125421510 is about 500.5613827962.

The spelling of 125421510 in words is "one hundred twenty-five million, four hundred twenty-one thousand, five hundred ten".