421257022 has 8 divisors (see below), whose sum is σ = 638020656. Its totient is φ = 208583472.

The previous prime is 421257019. The next prime is 421257041. The reversal of 421257022 is 220752124.

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 pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1022263 + ... + 1022674.

It is an arithmetic number, because the mean of its divisors is an integer number (79752582).

Almost surely, 2^421257022 is an apocalyptic number.

421257022 is a deficient number, since it is larger than the sum of its proper divisors (216763634).

421257022 is a wasteful number, since it uses less digits than its factorization.

421257022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2045042.

The product of its (nonzero) digits is 2240, while the sum is 25.

The square root of 421257022 is about 20524.5468159470. The cubic root of 421257022 is about 749.6336118569.

The spelling of 421257022 in words is "four hundred twenty-one million, two hundred fifty-seven thousand, twenty-two".