421402513 has 4 divisors (see below), whose sum is σ = 481602880. Its totient is φ = 361202148.

The previous prime is 421402489. The next prime is 421402519. The reversal of 421402513 is 315204124.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 421402513 - 2²¹ = 419305361 is a prime.

It is a super-3 number, since 3×421402513³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

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 3 ways as a sum of consecutive naturals, for example, 30100173 + ... + 30100186.

It is an arithmetic number, because the mean of its divisors is an integer number (120400720).

Almost surely, 2^421402513 is an apocalyptic number.

It is an amenable number.

421402513 is a deficient number, since it is larger than the sum of its proper divisors (60200367).

421402513 is an equidigital number, since it uses as much as digits as its factorization.

421402513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60200366.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 421402513 is about 20528.0908269620. The cubic root of 421402513 is about 749.7199031110.

Adding to 421402513 its reverse (315204124), we get a palindrome (736606637).

The spelling of 421402513 in words is "four hundred twenty-one million, four hundred two thousand, five hundred thirteen".