125577789 has 4 divisors (see below), whose sum is σ = 167437056. Its totient is φ = 83718524.

The previous prime is 125577787. The next prime is 125577811. The reversal of 125577789 is 987775521.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 125577789 - 2¹ = 125577787 is a prime.

It is a Curzon number.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125577787) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20929629 + ... + 20929634.

It is an arithmetic number, because the mean of its divisors is an integer number (41859264).

Almost surely, 2^125577789 is an apocalyptic number.

It is an amenable number.

125577789 is a deficient number, since it is larger than the sum of its proper divisors (41859267).

125577789 is an equidigital number, since it uses as much as digits as its factorization.

125577789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41859266.

The product of its digits is 1234800, while the sum is 51.

The square root of 125577789 is about 11206.1496063545. The cubic root of 125577789 is about 500.7692013850.

The spelling of 125577789 in words is "one hundred twenty-five million, five hundred seventy-seven thousand, seven hundred eighty-nine".