1421857564 has 12 divisors (see below), whose sum is σ = 2491378344. Its totient is φ = 710035184.

The previous prime is 1421857561. The next prime is 1421857607. The reversal of 1421857564 is 4657581241.

It is a self number, because there is not a number n which added to its sum of digits gives 1421857564.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1421857561) 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, 219814 + ... + 226189.

It is an arithmetic number, because the mean of its divisors is an integer number (207614862).

Almost surely, 2^1421857564 is an apocalyptic number.

It is an amenable number.

1421857564 is a deficient number, since it is larger than the sum of its proper divisors (1069520780).

1421857564 is a wasteful number, since it uses less digits than its factorization.

1421857564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 446804 (or 446802 counting only the distinct ones).

The product of its digits is 268800, while the sum is 43.

The square root of 1421857564 is about 37707.5266226784. The cubic root of 1421857564 is about 1124.4807648982.

The spelling of 1421857564 in words is "one billion, four hundred twenty-one million, eight hundred fifty-seven thousand, five hundred sixty-four".