126455640 has 128 divisors (see below), whose sum is σ = 410400000. Its totient is φ = 31062528.

The previous prime is 126455629. The next prime is 126455653. The reversal of 126455640 is 46554621.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 83611 + ... + 85109.

It is an arithmetic number, because the mean of its divisors is an integer number (3206250).

Almost surely, 2^126455640 is an apocalyptic number.

126455640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 126455640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (205200000).

126455640 is an abundant number, since it is smaller than the sum of its proper divisors (283944360).

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

126455640 is a wasteful number, since it uses less digits than its factorization.

126455640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1569 (or 1565 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 33.

The square root of 126455640 is about 11245.2496637469. The cubic root of 126455640 is about 501.9333678750.

The spelling of 126455640 in words is "one hundred twenty-six million, four hundred fifty-five thousand, six hundred forty".