126531623 has 4 divisors (see below), whose sum is σ = 126775008. Its totient is φ = 126288240.

The previous prime is 126531593. The next prime is 126531631. The reversal of 126531623 is 326135621.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-126531623 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126531683) 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, 120911 + ... + 121952.

It is an arithmetic number, because the mean of its divisors is an integer number (31693752).

Almost surely, 2^126531623 is an apocalyptic number.

126531623 is a deficient number, since it is larger than the sum of its proper divisors (243385).

126531623 is an equidigital number, since it uses as much as digits as its factorization.

126531623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243384.

The product of its digits is 6480, while the sum is 29.

The square root of 126531623 is about 11248.6276051792. The cubic root of 126531623 is about 502.0338794508.

The spelling of 126531623 in words is "one hundred twenty-six million, five hundred thirty-one thousand, six hundred twenty-three".