6451971 has 4 divisors (see below), whose sum is σ = 8602632. Its totient is φ = 4301312.

The previous prime is 6451967. The next prime is 6451987. The reversal of 6451971 is 1791546.

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 6451971 - 2² = 6451967 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (6451931) 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, 1075326 + ... + 1075331.

It is an arithmetic number, because the mean of its divisors is an integer number (2150658).

Almost surely, 2^6451971 is an apocalyptic number.

6451971 is a deficient number, since it is larger than the sum of its proper divisors (2150661).

6451971 is a wasteful number, since it uses less digits than its factorization.

6451971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2150660.

The product of its digits is 7560, while the sum is 33.

The square root of 6451971 is about 2540.0730304462. The cubic root of 6451971 is about 186.1647574730.

The spelling of 6451971 in words is "six million, four hundred fifty-one thousand, nine hundred seventy-one".