421720246 has 8 divisors (see below), whose sum is σ = 633386520. Its totient is φ = 210591408.

The previous prime is 421720231. The next prime is 421720279. The reversal of 421720246 is 642027124.

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, 132391 + ... + 135538.

It is an arithmetic number, because the mean of its divisors is an integer number (79173315).

Almost surely, 2^421720246 is an apocalyptic number.

421720246 is a deficient number, since it is larger than the sum of its proper divisors (211666274).

421720246 is a wasteful number, since it uses less digits than its factorization.

421720246 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268718.

The product of its (nonzero) digits is 5376, while the sum is 28.

The square root of 421720246 is about 20535.8283494969. The cubic root of 421720246 is about 749.9082827103.

The spelling of 421720246 in words is "four hundred twenty-one million, seven hundred twenty thousand, two hundred forty-six".