6451992 has 24 divisors (see below), whose sum is σ = 17474340. Its totient is φ = 2150640.

The previous prime is 6451987. The next prime is 6451997. The reversal of 6451992 is 2991546.

6451992 is a `hidden beast` number, since 645 + 1 + 9 + 9 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (6451987) and next prime (6451997).

It is a tau number, because it is divible by the number of its divisors (24).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6451997) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 44734 + ... + 44877.

Almost surely, 2^6451992 is an apocalyptic number.

It is an amenable number.

6451992 is an abundant number, since it is smaller than the sum of its proper divisors (11022348).

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

6451992 is a wasteful number, since it uses less digits than its factorization.

6451992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89623 (or 89616 counting only the distinct ones).

The product of its digits is 19440, while the sum is 36.

The square root of 6451992 is about 2540.0771641822. The cubic root of 6451992 is about 186.1649594503.

The spelling of 6451992 in words is "six million, four hundred fifty-one thousand, nine hundred ninety-two".