421025513 has 8 divisors (see below), whose sum is σ = 431120448. Its totient is φ = 410944464.

The previous prime is 421025489. The next prime is 421025531. The reversal of 421025513 is 315520124.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 421025513 - 2¹⁶ = 420959977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421025543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83420 + ... + 88322.

It is an arithmetic number, because the mean of its divisors is an integer number (53890056).

Almost surely, 2^421025513 is an apocalyptic number.

421025513 is a gapful number since it is divisible by the number (43) formed by its first and last digit.

It is an amenable number.

421025513 is a deficient number, since it is larger than the sum of its proper divisors (10094935).

421025513 is a wasteful number, since it uses less digits than its factorization.

421025513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6943.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 421025513 is about 20518.9062330330. The cubic root of 421025513 is about 749.4962620361.

Adding to 421025513 its reverse (315520124), we get a palindrome (736545637).

The spelling of 421025513 in words is "four hundred twenty-one million, twenty-five thousand, five hundred thirteen".