126125690 has 16 divisors (see below), whose sum is σ = 231310728. Its totient is φ = 49498176.

The previous prime is 126125689. The next prime is 126125719. The reversal of 126125690 is 96521621.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 74874409 + 51251281 = 8653^2 + 7159^2 .

It is a super-2 number, since 2×126125690² = 31815379355952200, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

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, 118457 + ... + 119516.

Almost surely, 2^126125690 is an apocalyptic number.

126125690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

126125690 is a deficient number, since it is larger than the sum of its proper divisors (105185038).

126125690 is a wasteful number, since it uses less digits than its factorization.

126125690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238033.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 126125690 is about 11230.5694423747. The cubic root of 126125690 is about 501.4964368853.

The spelling of 126125690 in words is "one hundred twenty-six million, one hundred twenty-five thousand, six hundred ninety".