182129421 has 16 divisors (see below), whose sum is σ = 261858240. Its totient is φ = 112222080.

The previous prime is 182129419. The next prime is 182129477. The reversal of 182129421 is 124921281.

It is a happy number.

182129421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 182129421 - 2¹ = 182129419 is a prime.

It is a super-2 number, since 2×182129421² = 66342251987590482, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (182129491) 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, 36630 + ... + 41303.

It is an arithmetic number, because the mean of its divisors is an integer number (16366140).

Almost surely, 2^182129421 is an apocalyptic number.

It is an amenable number.

182129421 is a deficient number, since it is larger than the sum of its proper divisors (79728819).

182129421 is a wasteful number, since it uses less digits than its factorization.

182129421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77996.

The product of its digits is 2304, while the sum is 30.

The square root of 182129421 is about 13495.5333721939. The cubic root of 182129421 is about 566.8394078134.

The spelling of 182129421 in words is "one hundred eighty-two million, one hundred twenty-nine thousand, four hundred twenty-one".