1421640675 has 216 divisors, whose sum is σ = 3244956000. Its totient is φ = 594397440.

The previous prime is 1421640641. The next prime is 1421640719. The reversal of 1421640675 is 5760461241.

1421640675 is a `hidden beast` number, since 1 + 4 + 2 + 1 + 640 + 6 + 7 + 5 = 666.

It is not a de Polignac number, because 1421640675 - 2⁷ = 1421640547 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 215 ways as a sum of consecutive naturals, for example, 13042521 + ... + 13042629.

Almost surely, 2^1421640675 is an apocalyptic number.

1421640675 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1421640675 is an abundant number, since it is smaller than the sum of its proper divisors (1823315325).

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

1421640675 is a wasteful number, since it uses less digits than its factorization.

1421640675 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172 (or 137 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 1421640675 is about 37704.6505752275. The cubic root of 1421640675 is about 1124.4235861960.

The spelling of 1421640675 in words is "one billion, four hundred twenty-one million, six hundred forty thousand, six hundred seventy-five".