126945640 has 16 divisors (see below), whose sum is σ = 285627780. Its totient is φ = 50778240.

The previous prime is 126945619. The next prime is 126945659. The reversal of 126945640 is 46549621.

It can be written as a sum of positive squares in 2 ways, for example, as 123343236 + 3602404 = 11106^2 + 1898^2 .

It is a super-2 number, since 2×126945640² = 32230391030019200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 126945640.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1586781 + ... + 1586860.

Almost surely, 2^126945640 is an apocalyptic number.

126945640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

126945640 is an abundant number, since it is smaller than the sum of its proper divisors (158682140).

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

126945640 is a wasteful number, since it uses less digits than its factorization.

126945640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3173652 (or 3173648 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 126945640 is about 11267.0155764515. The cubic root of 126945640 is about 502.5808422528.

The spelling of 126945640 in words is "one hundred twenty-six million, nine hundred forty-five thousand, six hundred forty".