1479415621 has 4 divisors (see below), whose sum is σ = 1479507372. Its totient is φ = 1479323872.

The previous prime is 1479415529. The next prime is 1479415643. The reversal of 1479415621 is 1265149741.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 1109622721 + 369792900 = 33311^2 + 19230^2 .

It is a cyclic number.

It is not a de Polignac number, because 1479415621 - 2⁹ = 1479415109 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 (1479415661) 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, 14566 + ... + 56311.

It is an arithmetic number, because the mean of its divisors is an integer number (369876843).

Almost surely, 2^1479415621 is an apocalyptic number.

It is an amenable number.

1479415621 is a deficient number, since it is larger than the sum of its proper divisors (91751).

1479415621 is an equidigital number, since it uses as much as digits as its factorization.

1479415621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91750.

The product of its digits is 60480, while the sum is 40.

The square root of 1479415621 is about 38463.1722690680. The cubic root of 1479415621 is about 1139.4538321995.

The spelling of 1479415621 in words is "one billion, four hundred seventy-nine million, four hundred fifteen thousand, six hundred twenty-one".