125787449 has 4 divisors (see below), whose sum is σ = 125814864. Its totient is φ = 125760036.

The previous prime is 125787401. The next prime is 125787461. The reversal of 125787449 is 944787521.

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 a de Polignac number, because none of the positive numbers 2^k-125787449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125787479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4967 + ... + 16620.

It is an arithmetic number, because the mean of its divisors is an integer number (31453716).

Almost surely, 2^125787449 is an apocalyptic number.

It is an amenable number.

125787449 is a deficient number, since it is larger than the sum of its proper divisors (27415).

125787449 is an equidigital number, since it uses as much as digits as its factorization.

125787449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27414.

The product of its digits is 564480, while the sum is 47.

The square root of 125787449 is about 11215.5003900851. The cubic root of 125787449 is about 501.0477349693.

The spelling of 125787449 in words is "one hundred twenty-five million, seven hundred eighty-seven thousand, four hundred forty-nine".