126165870 has 64 divisors (see below), whose sum is σ = 344298240. Its totient is φ = 32858784.

The previous prime is 126165847. The next prime is 126165911. The reversal of 126165870 is 78561621.

126165870 is a `hidden beast` number, since 12 + 61 + 6 + 587 + 0 = 666.

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, 6177 + ... + 17043.

It is an arithmetic number, because the mean of its divisors is an integer number (5379660).

Almost surely, 2^126165870 is an apocalyptic number.

126165870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 126165870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (172149120).

126165870 is an abundant number, since it is smaller than the sum of its proper divisors (218132370).

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

126165870 is a wasteful number, since it uses less digits than its factorization.

126165870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10926 (or 10920 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 126165870 is about 11232.3581673663. The cubic root of 126165870 is about 501.5496853220.

The spelling of 126165870 in words is "one hundred twenty-six million, one hundred sixty-five thousand, eight hundred seventy".