126905810 has 8 divisors (see below), whose sum is σ = 228430476. Its totient is φ = 50762320.

The previous prime is 126905791. The next prime is 126905813. The reversal of 126905810 is 18509621.

It can be written as a sum of positive squares in 2 ways, for example, as 126720049 + 185761 = 11257^2 + 431^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×126905810² = 32210169223512200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (126905813) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6345281 + ... + 6345300.

Almost surely, 2^126905810 is an apocalyptic number.

126905810 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

126905810 is a deficient number, since it is larger than the sum of its proper divisors (101524666).

126905810 is a wasteful number, since it uses less digits than its factorization.

126905810 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12690588.

The product of its (nonzero) digits is 4320, while the sum is 32.

The square root of 126905810 is about 11265.2478889725. The cubic root of 126905810 is about 502.5282741118.

The spelling of 126905810 in words is "one hundred twenty-six million, nine hundred five thousand, eight hundred ten".