420172134 has 16 divisors (see below), whose sum is σ = 846962688. Its totient is φ = 138954312.

The previous prime is 420172117. The next prime is 420172157. The reversal of 420172134 is 431271024.

It is a happy number.

It is a super-2 number, since 2×420172134² = 353089244380227912, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 274942 + ... + 276465.

It is an arithmetic number, because the mean of its divisors is an integer number (52935168).

Almost surely, 2^420172134 is an apocalyptic number.

420172134 is an abundant number, since it is smaller than the sum of its proper divisors (426790554).

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

420172134 is a wasteful number, since it uses less digits than its factorization.

420172134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 551539.

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 420172134 is about 20498.1007412882. The cubic root of 420172134 is about 748.9895334434.

The spelling of 420172134 in words is "four hundred twenty million, one hundred seventy-two thousand, one hundred thirty-four".