126728170 has 8 divisors (see below), whose sum is σ = 228110724. Its totient is φ = 50691264.

The previous prime is 126728167. The next prime is 126728177. The reversal of 126728170 is 71827621.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 122611329 + 4116841 = 11073^2 + 2029^2 .

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

It is not an unprimeable number, because it can be changed into a prime (126728177) 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, 6336399 + ... + 6336418.

Almost surely, 2^126728170 is an apocalyptic number.

126728170 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

126728170 is a deficient number, since it is larger than the sum of its proper divisors (101382554).

126728170 is a wasteful number, since it uses less digits than its factorization.

126728170 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12672824.

The product of its (nonzero) digits is 9408, while the sum is 34.

The square root of 126728170 is about 11257.3607031133. The cubic root of 126728170 is about 502.2936885627.

The spelling of 126728170 in words is "one hundred twenty-six million, seven hundred twenty-eight thousand, one hundred seventy".