421521254 has 32 divisors (see below), whose sum is σ = 800084736. Its totient is φ = 161773920.

The previous prime is 421521223. The next prime is 421521271. The reversal of 421521254 is 452125124.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10109 + ... + 30744.

It is an arithmetic number, because the mean of its divisors is an integer number (25002648).

Almost surely, 2^421521254 is an apocalyptic number.

421521254 is a deficient number, since it is larger than the sum of its proper divisors (378563482).

421521254 is a wasteful number, since it uses less digits than its factorization.

421521254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40940.

The product of its digits is 3200, while the sum is 26.

The square root of 421521254 is about 20530.9827821271. The cubic root of 421521254 is about 749.7903141220.

Adding to 421521254 its reverse (452125124), we get a palindrome (873646378).

The spelling of 421521254 in words is "four hundred twenty-one million, five hundred twenty-one thousand, two hundred fifty-four".