146143921 has 27 divisors (see below), whose sum is σ = 188061867. Its totient is φ = 113153040.

The previous prime is 146143913. The next prime is 146143927. The reversal of 146143921 is 129341641.

The square root of 146143921 is 12089.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 42837025 + 103306896 = 6545^2 + 10164^2 .

It is not a de Polignac number, because 146143921 - 2³ = 146143913 is a prime.

It is not an unprimeable number, because it can be changed into a prime (146143927) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 930775 + ... + 930931.

Almost surely, 2^146143921 is an apocalyptic number.

146143921 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

146143921 is the 12089-th square number.

146143921 is the 6045-th centered octagonal number.

It is an amenable number.

146143921 is a deficient number, since it is larger than the sum of its proper divisors (41917946).

146143921 is an equidigital number, since it uses as much as digits as its factorization.

146143921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350 (or 175 counting only the distinct ones).

The product of its digits is 5184, while the sum is 31.

The cubic root of 146143921 is about 526.7367078687.

Multiplying 146143921 by its product of digits (5184), we get a square (757610086464 = 870408²).

The spelling of 146143921 in words is "one hundred forty-six million, one hundred forty-three thousand, nine hundred twenty-one".