6457972 has 6 divisors (see below), whose sum is σ = 11301458. Its totient is φ = 3228984.

The previous prime is 6457949. The next prime is 6457987. The reversal of 6457972 is 2797546.

It can be written as a sum of positive squares in only one way, i.e., 5363856 + 1094116 = 2316^2 + 1046^2 .

It is an Ulam number.

It is a d-powerful number, because it can be written as 6³ + 4⁷ + 5⁵ + 7⁷ + 9⁷ + 7⁷ + 2¹³ .

It is a zygodrome in base 3.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 807243 + ... + 807250.

Almost surely, 2^6457972 is an apocalyptic number.

It is an amenable number.

6457972 is a deficient number, since it is larger than the sum of its proper divisors (4843486).

6457972 is a wasteful number, since it uses less digits than its factorization.

6457972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1614497 (or 1614495 counting only the distinct ones).

The product of its digits is 105840, while the sum is 40.

The square root of 6457972 is about 2541.2540211478. The cubic root of 6457972 is about 186.2224570775. Note that the first 3 decimals are identical.

The spelling of 6457972 in words is "six million, four hundred fifty-seven thousand, nine hundred seventy-two".