421428513 has 16 divisors (see below), whose sum is σ = 616755456. Its totient is φ = 253841040.

The previous prime is 421428481. The next prime is 421428533. The reversal of 421428513 is 315824124.

It is not a de Polignac number, because 421428513 - 2⁵ = 421428481 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (421428533) 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, 33795 + ... + 44552.

It is an arithmetic number, because the mean of its divisors is an integer number (38547216).

Almost surely, 2^421428513 is an apocalyptic number.

It is an amenable number.

421428513 is a deficient number, since it is larger than the sum of its proper divisors (195326943).

421428513 is a wasteful number, since it uses less digits than its factorization.

421428513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78524.

The product of its digits is 7680, while the sum is 30.

The square root of 421428513 is about 20528.7240957640. The cubic root of 421428513 is about 749.7353217160.

The spelling of 421428513 in words is "four hundred twenty-one million, four hundred twenty-eight thousand, five hundred thirteen".