126512431 has 16 divisors (see below), whose sum is σ = 137622240. Its totient is φ = 115914240.

The previous prime is 126512411. The next prime is 126512437. The reversal of 126512431 is 134215621.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 126512431 - 2⁹ = 126511919 is a prime.

It is a super-2 number, since 2×126512431² = 32010790395059522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 126512396 and 126512405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126512437) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72651 + ... + 74371.

It is an arithmetic number, because the mean of its divisors is an integer number (8601390).

Almost surely, 2^126512431 is an apocalyptic number.

126512431 is a deficient number, since it is larger than the sum of its proper divisors (11109809).

126512431 is a wasteful number, since it uses less digits than its factorization.

126512431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1866.

The product of its digits is 1440, while the sum is 25.

The square root of 126512431 is about 11247.7744909826. The cubic root of 126512431 is about 502.0084957531.

The spelling of 126512431 in words is "one hundred twenty-six million, five hundred twelve thousand, four hundred thirty-one".