126545731 has 4 divisors (see below), whose sum is σ = 136280032. Its totient is φ = 116811432.

The previous prime is 126545729. The next prime is 126545759. The reversal of 126545731 is 137545621.

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

It is a cyclic number.

It is not a de Polignac number, because 126545731 - 2¹ = 126545729 is a prime.

It is a super-2 number, since 2×126545731² = 32027644068648722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126545791) 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, 4867131 + ... + 4867156.

It is an arithmetic number, because the mean of its divisors is an integer number (34070008).

Almost surely, 2^126545731 is an apocalyptic number.

126545731 is a deficient number, since it is larger than the sum of its proper divisors (9734301).

126545731 is an equidigital number, since it uses as much as digits as its factorization.

126545731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9734300.

The product of its digits is 25200, while the sum is 34.

The square root of 126545731 is about 11249.2546864226. The cubic root of 126545731 is about 502.0525373182.

The spelling of 126545731 in words is "one hundred twenty-six million, five hundred forty-five thousand, seven hundred thirty-one".