125512451 has 4 divisors (see below), whose sum is σ = 127280304. Its totient is φ = 123744600.

The previous prime is 125512433. The next prime is 125512463. The reversal of 125512451 is 154215521.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 125512451 - 2¹⁰ = 125511427 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 125512451.

It is not an unprimeable number, because it can be changed into a prime (125572451) 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, 883820 + ... + 883961.

It is an arithmetic number, because the mean of its divisors is an integer number (31820076).

Almost surely, 2^125512451 is an apocalyptic number.

125512451 is a deficient number, since it is larger than the sum of its proper divisors (1767853).

125512451 is an equidigital number, since it uses as much as digits as its factorization.

125512451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1767852.

The product of its digits is 2000, while the sum is 26.

The square root of 125512451 is about 11203.2339527478. The cubic root of 125512451 is about 500.6823364105.

Adding to 125512451 its reverse (154215521), we get a palindrome (279727972).

The spelling of 125512451 in words is "one hundred twenty-five million, five hundred twelve thousand, four hundred fifty-one".