421402515 has 16 divisors (see below), whose sum is σ = 674707968. Its totient is φ = 224593376.

The previous prime is 421402489. The next prime is 421402519. The reversal of 421402515 is 515204124.

421402515 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 421402515 - 2¹¹ = 421400467 is a prime.

It is not an unprimeable number, because it can be changed into a prime (421402519) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14872 + ... + 32618.

It is an arithmetic number, because the mean of its divisors is an integer number (42169248).

Almost surely, 2^421402515 is an apocalyptic number.

421402515 is a deficient number, since it is larger than the sum of its proper divisors (253305453).

421402515 is a wasteful number, since it uses less digits than its factorization.

421402515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19338.

The product of its (nonzero) digits is 1600, while the sum is 24.

The square root of 421402515 is about 20528.0908756757. The cubic root of 421402515 is about 749.7199042971.

Adding to 421402515 its reverse (515204124), we get a palindrome (936606639).

The spelling of 421402515 in words is "four hundred twenty-one million, four hundred two thousand, five hundred fifteen".