125423202451 has 4 divisors (see below), whose sum is σ = 126053470000. Its totient is φ = 124792934904.

The previous prime is 125423202449. The next prime is 125423202461. The reversal of 125423202451 is 154202324521.

It is a happy number.

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 125423202451 - 2¹ = 125423202449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125423202461) 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, 315133476 + ... + 315133873.

It is an arithmetic number, because the mean of its divisors is an integer number (31513367500).

Almost surely, 2^125423202451 is an apocalyptic number.

125423202451 is a deficient number, since it is larger than the sum of its proper divisors (630267549).

125423202451 is an equidigital number, since it uses as much as digits as its factorization.

125423202451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 630267548.

The product of its (nonzero) digits is 19200, while the sum is 31.

Adding to 125423202451 its reverse (154202324521), we get a palindrome (279625526972).

The spelling of 125423202451 in words is "one hundred twenty-five billion, four hundred twenty-three million, two hundred two thousand, four hundred fifty-one".