1421652643 has 4 divisors (see below), whose sum is σ = 1422956808. Its totient is φ = 1420348480.

The previous prime is 1421652629. The next prime is 1421652647. The reversal of 1421652643 is 3462561241.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1421652643 - 2²⁵ = 1388098211 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1421652599 and 1421652608.

It is not an unprimeable number, because it can be changed into a prime (1421652647) 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, 650446 + ... + 652627.

It is an arithmetic number, because the mean of its divisors is an integer number (355739202).

Almost surely, 2^1421652643 is an apocalyptic number.

1421652643 is a deficient number, since it is larger than the sum of its proper divisors (1304165).

1421652643 is a wasteful number, since it uses less digits than its factorization.

1421652643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1304164.

The product of its digits is 34560, while the sum is 34.

The square root of 1421652643 is about 37704.8092821062. The cubic root of 1421652643 is about 1124.4267414855.

The spelling of 1421652643 in words is "one billion, four hundred twenty-one million, six hundred fifty-two thousand, six hundred forty-three".