421523122 has 4 divisors (see below), whose sum is σ = 632284686. Its totient is φ = 210761560.

The previous prime is 421523111. The next prime is 421523131. The reversal of 421523122 is 221325124.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 418243401 + 3279721 = 20451^2 + 1811^2 .

It is a junction number, because it is equal to n+sod(n) for n = 421523093 and 421523102.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105380779 + ... + 105380782.

Almost surely, 2^421523122 is an apocalyptic number.

421523122 is a deficient number, since it is larger than the sum of its proper divisors (210761564).

421523122 is a wasteful number, since it uses less digits than its factorization.

421523122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210761563.

The product of its digits is 960, while the sum is 22.

The square root of 421523122 is about 20531.0282742974. The cubic root of 421523122 is about 749.7914217025.

Adding to 421523122 its reverse (221325124), we get a palindrome (642848246).

The spelling of 421523122 in words is "four hundred twenty-one million, five hundred twenty-three thousand, one hundred twenty-two".