421512254 has 4 divisors (see below), whose sum is σ = 632268384. Its totient is φ = 210756126.

The previous prime is 421512253. The next prime is 421512317. The reversal of 421512254 is 452215124.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421512253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105378062 + ... + 105378065.

It is an arithmetic number, because the mean of its divisors is an integer number (158067096).

Almost surely, 2^421512254 is an apocalyptic number.

421512254 is a deficient number, since it is larger than the sum of its proper divisors (210756130).

421512254 is a wasteful number, since it uses less digits than its factorization.

421512254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210756129.

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

The square root of 421512254 is about 20530.7636000223. The cubic root of 421512254 is about 749.7849777672.

Adding to 421512254 its reverse (452215124), we get a palindrome (873727378).

The spelling of 421512254 in words is "four hundred twenty-one million, five hundred twelve thousand, two hundred fifty-four".