125788649 has 16 divisors (see below), whose sum is σ = 148621440. Its totient is φ = 104232960.

The previous prime is 125788639. The next prime is 125788651. The reversal of 125788649 is 946887521.

It is a cyclic number.

It is not a de Polignac number, because 125788649 - 2¹⁶ = 125723113 is a prime.

It is a Duffinian number.

Its product of digits (967680) is a multiple of the sum of its prime divisors (5120).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 125788597 and 125788606.

It is not an unprimeable number, because it can be changed into a prime (125788609) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22697 + ... + 27689.

It is an arithmetic number, because the mean of its divisors is an integer number (9288840).

Almost surely, 2^125788649 is an apocalyptic number.

It is an amenable number.

125788649 is a deficient number, since it is larger than the sum of its proper divisors (22832791).

125788649 is an equidigital number, since it uses as much as digits as its factorization.

125788649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5120.

The product of its digits is 967680, while the sum is 50.

The square root of 125788649 is about 11215.5538873477. The cubic root of 125788649 is about 501.0493282798.

The spelling of 125788649 in words is "one hundred twenty-five million, seven hundred eighty-eight thousand, six hundred forty-nine".