126645831 has 12 divisors (see below), whose sum is σ = 197004808. Its totient is φ = 77935824.

The previous prime is 126645823. The next prime is 126645833. The reversal of 126645831 is 138546621.

It is a happy number.

126645831 is a `hidden beast` number, since 1 + 2 + 6 + 645 + 8 + 3 + 1 = 666.

It is not a de Polignac number, because 126645831 - 2³ = 126645823 is a prime.

It is a super-2 number, since 2×126645831² = 32078333019361122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126645833) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 541105 + ... + 541338.

Almost surely, 2^126645831 is an apocalyptic number.

126645831 is a deficient number, since it is larger than the sum of its proper divisors (70358977).

126645831 is a wasteful number, since it uses less digits than its factorization.

126645831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1082462 (or 1082459 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 126645831 is about 11253.7029905716. The cubic root of 126645831 is about 502.1848800253.

The spelling of 126645831 in words is "one hundred twenty-six million, six hundred forty-five thousand, eight hundred thirty-one".