126531550 has 24 divisors (see below), whose sum is σ = 235946952. Its totient is φ = 50484000.

The previous prime is 126531547. The next prime is 126531569. The reversal of 126531550 is 55135621.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18045 + ... + 24055.

It is an arithmetic number, because the mean of its divisors is an integer number (9831123).

Almost surely, 2^126531550 is an apocalyptic number.

126531550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

126531550 is a deficient number, since it is larger than the sum of its proper divisors (109415402).

126531550 is a wasteful number, since it uses less digits than its factorization.

126531550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6444 (or 6439 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 28.

The square root of 126531550 is about 11248.6243603385. The cubic root of 126531550 is about 502.0337829045.

The spelling of 126531550 in words is "one hundred twenty-six million, five hundred thirty-one thousand, five hundred fifty".