9615421 has 4 divisors (see below), whose sum is σ = 10181052. Its totient is φ = 9049792.

The previous prime is 9615413. The next prime is 9615427. The reversal of 9615421 is 1245169.

9615421 is digitally balanced in base 2 and base 3, because in such bases 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 5812921 + 3802500 = 2411^2 + 1950^2 .

It is a cyclic number.

It is not a de Polignac number, because 9615421 - 2³ = 9615413 is a prime.

It is a Duffinian number.

9615421 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 9615421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9615427) 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, 282790 + ... + 282823.

It is an arithmetic number, because the mean of its divisors is an integer number (2545263).

Almost surely, 2^9615421 is an apocalyptic number.

It is an amenable number.

9615421 is a deficient number, since it is larger than the sum of its proper divisors (565631).

9615421 is a wasteful number, since it uses less digits than its factorization.

9615421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 565630.

The product of its digits is 2160, while the sum is 28.

The square root of 9615421 is about 3100.8742315676. The cubic root of 9615421 is about 212.6454533576.

The spelling of 9615421 in words is "nine million, six hundred fifteen thousand, four hundred twenty-one".