6415072421 has 8 divisors (see below), whose sum is σ = 6573473088. Its totient is φ = 6256764000.

The previous prime is 6415072403. The next prime is 6415072423. The reversal of 6415072421 is 1242705146.

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

It is not a de Polignac number, because 6415072421 - 2⁶ = 6415072357 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 (6415072423) 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, 130136 + ... + 172526.

It is an arithmetic number, because the mean of its divisors is an integer number (821684136).

Almost surely, 2^6415072421 is an apocalyptic number.

It is an amenable number.

6415072421 is a deficient number, since it is larger than the sum of its proper divisors (158400667).

6415072421 is a wasteful number, since it uses less digits than its factorization.

6415072421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46123.

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 6415072421 is about 80094.1472331156. The cubic root of 6415072421 is about 1858.0918903750.

Adding to 6415072421 its reverse (1242705146), we get a palindrome (7657777567).

The spelling of 6415072421 in words is "six billion, four hundred fifteen million, seventy-two thousand, four hundred twenty-one".