126500019 has 16 divisors (see below), whose sum is σ = 170586240. Its totient is φ = 83378880.

The previous prime is 126499991. The next prime is 126500041. The reversal of 126500019 is 910005621.

It is not a de Polignac number, because 126500019 - 2²⁴ = 109722803 is a prime.

It is a super-2 number, since 2×126500019² = 32004509614000722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (126500089) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 160344 + ... + 161130.

It is an arithmetic number, because the mean of its divisors is an integer number (10661640).

Almost surely, 2^126500019 is an apocalyptic number.

126500019 is a deficient number, since it is larger than the sum of its proper divisors (44086221).

126500019 is a wasteful number, since it uses less digits than its factorization.

126500019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1330.

The product of its (nonzero) digits is 540, while the sum is 24.

The square root of 126500019 is about 11247.2227238550. Note that the first 3 decimals coincide. The cubic root of 126500019 is about 501.9920780431.

The spelling of 126500019 in words is "one hundred twenty-six million, five hundred thousand, nineteen".