1421213563 has 16 divisors (see below), whose sum is σ = 1800956160. Its totient is φ = 1089280800.

The previous prime is 1421213537. The next prime is 1421213579. The reversal of 1421213563 is 3653121241.

It is a cyclic number.

It is not a de Polignac number, because 1421213563 - 2²¹ = 1419116411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1421213503) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 146593 + ... + 155986.

It is an arithmetic number, because the mean of its divisors is an integer number (112559760).

Almost surely, 2^1421213563 is an apocalyptic number.

1421213563 is a deficient number, since it is larger than the sum of its proper divisors (379742597).

1421213563 is a wasteful number, since it uses less digits than its factorization.

1421213563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302658.

The product of its digits is 4320, while the sum is 28.

The square root of 1421213563 is about 37698.9862330541. The cubic root of 1421213563 is about 1124.3109691523.

The spelling of 1421213563 in words is "one billion, four hundred twenty-one million, two hundred thirteen thousand, five hundred sixty-three".