421153225 has 12 divisors (see below), whose sum is σ = 540238860. Its totient is φ = 325304000.

The previous prime is 421153199. The next prime is 421153231. The reversal of 421153225 is 522351124.

It can be written as a sum of positive squares in 6 ways, for example, as 3523129 + 417630096 = 1877^2 + 20436^2 .

It is not a de Polignac number, because 421153225 - 2²³ = 412764617 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a self number, because there is not a number n which added to its sum of digits gives 421153225.

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 11 ways as a sum of consecutive naturals, for example, 289726 + ... + 291175.

It is an arithmetic number, because the mean of its divisors is an integer number (45019905).

Almost surely, 2^421153225 is an apocalyptic number.

It is an amenable number.

421153225 is a deficient number, since it is larger than the sum of its proper divisors (119085635).

421153225 is a wasteful number, since it uses less digits than its factorization.

421153225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 580940 (or 580935 counting only the distinct ones).

The product of its digits is 2400, while the sum is 25.

The square root of 421153225 is about 20522.0180537880. The cubic root of 421153225 is about 749.5720373252.

The spelling of 421153225 in words is "four hundred twenty-one million, one hundred fifty-three thousand, two hundred twenty-five".