64671425 has 72 divisors (see below), whose sum is σ = 104493312. Its totient is φ = 39312000.

The previous prime is 64671419. The next prime is 64671433. The reversal of 64671425 is 52417646.

It is not a de Polignac number, because 64671425 - 2⁶ = 64671361 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 493610 + ... + 493740.

It is an arithmetic number, because the mean of its divisors is an integer number (1451296).

Almost surely, 2^64671425 is an apocalyptic number.

64671425 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

64671425 is a deficient number, since it is larger than the sum of its proper divisors (39821887).

64671425 is a wasteful number, since it uses less digits than its factorization.

64671425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199 (or 187 counting only the distinct ones).

The product of its digits is 40320, while the sum is 35.

The square root of 64671425 is about 8041.8545746612. The cubic root of 64671425 is about 401.3939387773.

The spelling of 64671425 in words is "sixty-four million, six hundred seventy-one thousand, four hundred twenty-five".