126551540 has 24 divisors (see below), whose sum is σ = 266636832. Its totient is φ = 50453280.

The previous prime is 126551539. The next prime is 126551567. The reversal of 126551540 is 45155621.

It is a happy number.

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4166 + ... + 16445.

It is an arithmetic number, because the mean of its divisors is an integer number (11109868).

Almost surely, 2^126551540 is an apocalyptic number.

126551540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

126551540 is an abundant number, since it is smaller than the sum of its proper divisors (140085292).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

126551540 is a wasteful number, since it uses less digits than its factorization.

126551540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20927 (or 20925 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 29.

The square root of 126551540 is about 11249.5128783428. The cubic root of 126551540 is about 502.0602193331.

The spelling of 126551540 in words is "one hundred twenty-six million, five hundred fifty-one thousand, five hundred forty".