125578394 has 4 divisors (see below), whose sum is σ = 188367594. Its totient is φ = 62789196.

The previous prime is 125578357. The next prime is 125578399. The reversal of 125578394 is 493875521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 493875521 = 421 ⋅1173101.

It can be written as a sum of positive squares in only one way, i.e., 97752769 + 27825625 = 9887^2 + 5275^2 .

It is not an unprimeable number, because it can be changed into a prime (125578399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31394597 + ... + 31394600.

Almost surely, 2^125578394 is an apocalyptic number.

125578394 is a deficient number, since it is larger than the sum of its proper divisors (62789200).

125578394 is an equidigital number, since it uses as much as digits as its factorization.

125578394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62789199.

The product of its digits is 302400, while the sum is 44.

The square root of 125578394 is about 11206.1766004289. The cubic root of 125578394 is about 500.7700055741.

The spelling of 125578394 in words is "one hundred twenty-five million, five hundred seventy-eight thousand, three hundred ninety-four".