126640576 has 56 divisors (see below), whose sum is σ = 264078720. Its totient is φ = 60141312.

The previous prime is 126640571. The next prime is 126640601. The reversal of 126640576 is 675046621.

It is a happy number.

It is a super-2 number, since 2×126640576² = 32075670979223552, which contains 22 as substring.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126640571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 333955 + ... + 334333.

Almost surely, 2^126640576 is an apocalyptic number.

126640576 is a gapful number since it is divisible by the number (16) 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 126640576, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (132039360).

126640576 is an abundant number, since it is smaller than the sum of its proper divisors (137438144).

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

126640576 is a wasteful number, since it uses less digits than its factorization.

126640576 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 641 (or 631 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 37.

The square root of 126640576 is about 11253.4695094446. The cubic root of 126640576 is about 502.1779340984.

The spelling of 126640576 in words is "one hundred twenty-six million, six hundred forty thousand, five hundred seventy-six".