421261225 has 48 divisors (see below), whose sum is σ = 663707520. Its totient is φ = 257587200.

The previous prime is 421261223. The next prime is 421261231. The reversal of 421261225 is 522162124.

It is not a de Polignac number, because 421261225 - 2¹ = 421261223 is a prime.

It is a super-2 number, since 2×421261225² = 354922039377001250, which contains 22 as substring.

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 421261225.

It is not an unprimeable number, because it can be changed into a prime (421261223) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 99961 + ... + 104089.

It is an arithmetic number, because the mean of its divisors is an integer number (13827240).

Almost surely, 2^421261225 is an apocalyptic number.

It is an amenable number.

421261225 is a deficient number, since it is larger than the sum of its proper divisors (242446295).

421261225 is a wasteful number, since it uses less digits than its factorization.

421261225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4210 (or 4205 counting only the distinct ones).

The product of its digits is 1920, while the sum is 25.

The square root of 421261225 is about 20524.6492052848. The cubic root of 421261225 is about 749.6361049506.

The spelling of 421261225 in words is "four hundred twenty-one million, two hundred sixty-one thousand, two hundred twenty-five".