126431501 has 4 divisors (see below), whose sum is σ = 144493152. Its totient is φ = 108369852.

The previous prime is 126431471. The next prime is 126431507. The reversal of 126431501 is 105134621.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 126431501 - 2¹⁰ = 126430477 is a prime.

It is a super-2 number, since 2×126431501² = 31969848890226002, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126431507) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9030815 + ... + 9030828.

It is an arithmetic number, because the mean of its divisors is an integer number (36123288).

Almost surely, 2^126431501 is an apocalyptic number.

It is an amenable number.

126431501 is a deficient number, since it is larger than the sum of its proper divisors (18061651).

126431501 is an equidigital number, since it uses as much as digits as its factorization.

126431501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18061650.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 126431501 is about 11244.1763148752. The cubic root of 126431501 is about 501.9014279773.

The spelling of 126431501 in words is "one hundred twenty-six million, four hundred thirty-one thousand, five hundred one".