61415421 has 8 divisors (see below), whose sum is σ = 82078080. Its totient is φ = 40848192.

The previous prime is 61415413. The next prime is 61415443. The reversal of 61415421 is 12451416.

It is a happy number.

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

It is not a de Polignac number, because 61415421 - 2³ = 61415413 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61415391 and 61415400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61415461) 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, 22341 + ... + 24938.

It is an arithmetic number, because the mean of its divisors is an integer number (10259760).

Almost surely, 2^61415421 is an apocalyptic number.

It is an amenable number.

61415421 is a deficient number, since it is larger than the sum of its proper divisors (20662659).

61415421 is a wasteful number, since it uses less digits than its factorization.

61415421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47715.

The product of its digits is 960, while the sum is 24.

The square root of 61415421 is about 7836.7991552674. The cubic root of 61415421 is about 394.5413059279.

Adding to 61415421 its reverse (12451416), we get a palindrome (73866837).

The spelling of 61415421 in words is "sixty-one million, four hundred fifteen thousand, four hundred twenty-one".