125137890 has 24 divisors (see below), whose sum is σ = 325358748. Its totient is φ = 33370080.

The previous prime is 125137861. The next prime is 125137907. The reversal of 125137890 is 98731521.

It can be written as a sum of positive squares in 2 ways, for example, as 109432521 + 15705369 = 10461^2 + 3963^2 .

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 695121 + ... + 695300.

Almost surely, 2^125137890 is an apocalyptic number.

125137890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

125137890 is an abundant number, since it is smaller than the sum of its proper divisors (200220858).

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

125137890 is a wasteful number, since it uses less digits than its factorization.

125137890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1390434 (or 1390431 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 36.

The square root of 125137890 is about 11186.5048160719. The cubic root of 125137890 is about 500.1837857706.

The spelling of 125137890 in words is "one hundred twenty-five million, one hundred thirty-seven thousand, eight hundred ninety".