1379145421 has 4 divisors (see below), whose sum is σ = 1386076000. Its totient is φ = 1372214844.

The previous prime is 1379145409. The next prime is 1379145461. The reversal of 1379145421 is 1245419731.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1379145421 - 2¹¹ = 1379143373 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 (1379145461) 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, 3464991 + ... + 3465388.

It is an arithmetic number, because the mean of its divisors is an integer number (346519000).

Almost surely, 2^1379145421 is an apocalyptic number.

It is an amenable number.

1379145421 is a deficient number, since it is larger than the sum of its proper divisors (6930579).

1379145421 is an equidigital number, since it uses as much as digits as its factorization.

1379145421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6930578.

The product of its digits is 30240, while the sum is 37.

The square root of 1379145421 is about 37136.8472140541. The cubic root of 1379145421 is about 1113.1064191372.

The spelling of 1379145421 in words is "one billion, three hundred seventy-nine million, one hundred forty-five thousand, four hundred twenty-one".