420021254 has 8 divisors (see below), whose sum is σ = 635812320. Its totient is φ = 208083816.

The previous prime is 420021241. The next prime is 420021269. The reversal of 420021254 is 452120024.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 963134 + ... + 963569.

It is an arithmetic number, because the mean of its divisors is an integer number (79476540).

Almost surely, 2^420021254 is an apocalyptic number.

420021254 is a deficient number, since it is larger than the sum of its proper divisors (215791066).

420021254 is a wasteful number, since it uses less digits than its factorization.

420021254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1926814.

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 420021254 is about 20494.4200698629. The cubic root of 420021254 is about 748.8998709289.

Adding to 420021254 its reverse (452120024), we get a palindrome (872141278).

The spelling of 420021254 in words is "four hundred twenty million, twenty-one thousand, two hundred fifty-four".