64211425 has 6 divisors (see below), whose sum is σ = 79622198. Its totient is φ = 51369120.

The previous prime is 64211359. The next prime is 64211429. The reversal of 64211425 is 52411246.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 12702096 + 51509329 = 3564^2 + 7177^2 .

It is not a de Polignac number, because 64211425 - 2¹¹ = 64209377 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25), and also a Moran number because the ratio is a prime number: 2568457 = 64211425 / (6 + 4 + 2 + 1 + 1 + 4 + 2 + 5).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 64211425.

It is not an unprimeable number, because it can be changed into a prime (64211429) 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, 1284204 + ... + 1284253.

Almost surely, 2^64211425 is an apocalyptic number.

It is an amenable number.

64211425 is a deficient number, since it is larger than the sum of its proper divisors (15410773).

64211425 is a wasteful number, since it uses less digits than its factorization.

64211425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2568467 (or 2568462 counting only the distinct ones).

The product of its digits is 1920, while the sum is 25.

The square root of 64211425 is about 8013.2031672734. The cubic root of 64211425 is about 400.4399846064.

The spelling of 64211425 in words is "sixty-four million, two hundred eleven thousand, four hundred twenty-five".