1421663652 has 36 divisors (see below), whose sum is σ = 3615183936. Its totient is φ = 471048240.

The previous prime is 1421663651. The next prime is 1421663671. The reversal of 1421663652 is 2563661241.

1421663652 is a `hidden beast` number, since 1 + 4 + 2 + 16 + 636 + 5 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×1421663652² = 4042255078835954208, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (1421663651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 112224 + ... + 124247.

It is an arithmetic number, because the mean of its divisors is an integer number (100421776).

Almost surely, 2^1421663652 is an apocalyptic number.

1421663652 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1421663652 is an abundant number, since it is smaller than the sum of its proper divisors (2193520284).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1421663652 is a wasteful number, since it uses less digits than its factorization.

1421663652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236648 (or 236643 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 1421663652 is about 37704.9552711577. The cubic root of 1421663652 is about 1124.4296439250.

The spelling of 1421663652 in words is "one billion, four hundred twenty-one million, six hundred sixty-three thousand, six hundred fifty-two".