64212125 has 8 divisors (see below), whose sum is σ = 80136888. Its totient is φ = 51369600.

The previous prime is 64212121. The next prime is 64212143. The reversal of 64212125 is 52121246.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 18757561 + 45454564 = 4331^2 + 6742^2 .

It is not a de Polignac number, because 64212125 - 2² = 64212121 is a prime.

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 64212125.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64212121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 256724 + ... + 256973.

It is an arithmetic number, because the mean of its divisors is an integer number (10017111).

Almost surely, 2^64212125 is an apocalyptic number.

It is an amenable number.

64212125 is a deficient number, since it is larger than the sum of its proper divisors (15924763).

64212125 is an equidigital number, since it uses as much as digits as its factorization.

64212125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 513712 (or 513702 counting only the distinct ones).

The product of its digits is 960, while the sum is 23.

The square root of 64212125 is about 8013.2468450685. The cubic root of 64212125 is about 400.4414397315.

The spelling of 64212125 in words is "sixty-four million, two hundred twelve thousand, one hundred twenty-five".