424132921 has 2 divisors, whose sum is σ = 424132922. Its totient is φ = 424132920.

The previous prime is 424132873. The next prime is 424132937. The reversal of 424132921 is 129231424.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 304886521 + 119246400 = 17461^2 + 10920^2 .

It is a cyclic number.

It is not a de Polignac number, because 424132921 - 2¹⁵ = 424100153 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 424132921.

It is not a weakly prime, because it can be changed into another prime (424132321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212066460 + 212066461.

It is an arithmetic number, because the mean of its divisors is an integer number (212066461).

Almost surely, 2^424132921 is an apocalyptic number.

It is an amenable number.

424132921 is a deficient number, since it is larger than the sum of its proper divisors (1).

424132921 is an equidigital number, since it uses as much as digits as its factorization.

424132921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3456, while the sum is 28.

The square root of 424132921 is about 20594.4876362584. The cubic root of 424132921 is about 751.3356472425.

The spelling of 424132921 in words is "four hundred twenty-four million, one hundred thirty-two thousand, nine hundred twenty-one".