126521746 has 8 divisors (see below), whose sum is σ = 204381324. Its totient is φ = 58394640.

The previous prime is 126521723. The next prime is 126521767. The reversal of 126521746 is 647125621.

It can be written as a sum of positive squares in 2 ways, for example, as 106316721 + 20205025 = 10311^2 + 4495^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2433085 + ... + 2433136.

Almost surely, 2^126521746 is an apocalyptic number.

126521746 is a deficient number, since it is larger than the sum of its proper divisors (77859578).

126521746 is a wasteful number, since it uses less digits than its factorization.

126521746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4866236.

The product of its digits is 20160, while the sum is 34.

The square root of 126521746 is about 11248.1885652757. The cubic root of 126521746 is about 502.0208162667.

The spelling of 126521746 in words is "one hundred twenty-six million, five hundred twenty-one thousand, seven hundred forty-six".