652315421 has 4 divisors (see below), whose sum is σ = 655115292. Its totient is φ = 649515552.

The previous prime is 652315409. The next prime is 652315441. The reversal of 652315421 is 124513256.

652315421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 442471225 + 209844196 = 21035^2 + 14486^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-652315421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (652315441) 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, 1399586 + ... + 1400051.

It is an arithmetic number, because the mean of its divisors is an integer number (163778823).

Almost surely, 2^652315421 is an apocalyptic number.

It is an amenable number.

652315421 is a deficient number, since it is larger than the sum of its proper divisors (2799871).

652315421 is a wasteful number, since it uses less digits than its factorization.

652315421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2799870.

The product of its digits is 7200, while the sum is 29.

The square root of 652315421 is about 25540.4663426493. The cubic root of 652315421 is about 867.2664547505.

Adding to 652315421 its reverse (124513256), we get a palindrome (776828677).

The spelling of 652315421 in words is "six hundred fifty-two million, three hundred fifteen thousand, four hundred twenty-one".