125001690 has 32 divisors (see below), whose sum is σ = 327278016. Its totient is φ = 30303360.

The previous prime is 125001689. The next prime is 125001713. The reversal of 125001690 is 96100521.

It is a super-2 number, since 2×125001690² = 31250845005712200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 125001690.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 189067 + ... + 189726.

It is an arithmetic number, because the mean of its divisors is an integer number (10227438).

Almost surely, 2^125001690 is an apocalyptic number.

125001690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

125001690 is an abundant number, since it is smaller than the sum of its proper divisors (202276326).

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

125001690 is a wasteful number, since it uses less digits than its factorization.

125001690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378814.

The product of its (nonzero) digits is 540, while the sum is 24.

The square root of 125001690 is about 11180.4154663411. The cubic root of 125001690 is about 500.0022533232.

The spelling of 125001690 in words is "one hundred twenty-five million, one thousand, six hundred ninety".