1421556357 has 8 divisors (see below), whose sum is σ = 2041209184. Its totient is φ = 874803888.

The previous prime is 1421556349. The next prime is 1421556359. The reversal of 1421556357 is 7536551241.

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

It is not a de Polignac number, because 1421556357 - 2³ = 1421556349 is a prime.

It is a super-2 number, since 2×1421556357² = 4041644952254222898, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 36450163 = 1421556357 / (1 + 4 + 2 + 1 + 5 + 5 + 6 + 3 + 5 + 7).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1421556359) 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, 18225043 + ... + 18225120.

It is an arithmetic number, because the mean of its divisors is an integer number (255151148).

Almost surely, 2^1421556357 is an apocalyptic number.

It is an amenable number.

1421556357 is a deficient number, since it is larger than the sum of its proper divisors (619652827).

1421556357 is a wasteful number, since it uses less digits than its factorization.

1421556357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36450179.

The product of its digits is 126000, while the sum is 39.

The square root of 1421556357 is about 37703.5324207162. The cubic root of 1421556357 is about 1124.4013557726.

The spelling of 1421556357 in words is "one billion, four hundred twenty-one million, five hundred fifty-six thousand, three hundred fifty-seven".