125640464 has 40 divisors (see below), whose sum is σ = 259894080. Its totient is φ = 58665600.

The previous prime is 125640461. The next prime is 125640481. The reversal of 125640464 is 464046521.

It is a self number, because there is not a number n which added to its sum of digits gives 125640464.

It is not an unprimeable number, because it can be changed into a prime (125640461) 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, 18674 + ... + 24494.

It is an arithmetic number, because the mean of its divisors is an integer number (6497352).

Almost surely, 2^125640464 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 125640464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (129947040).

125640464 is an abundant number, since it is smaller than the sum of its proper divisors (134253616).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

125640464 is a wasteful number, since it uses less digits than its factorization.

125640464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5919 (or 5913 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 32.

The square root of 125640464 is about 11208.9457131347. The cubic root of 125640464 is about 500.8524976694.

Adding to 125640464 its reverse (464046521), we get a palindrome (589686985).

The spelling of 125640464 in words is "one hundred twenty-five million, six hundred forty thousand, four hundred sixty-four".