125001251251 has 8 divisors (see below), whose sum is σ = 127418701104. Its totient is φ = 122606935200.

The previous prime is 125001251233. The next prime is 125001251269. The reversal of 125001251251 is 152152100521.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (125001251233) and next prime (125001251269).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 125001251251 - 2⁹ = 125001250739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125001254251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5772540 + ... + 5794153.

It is an arithmetic number, because the mean of its divisors is an integer number (15927337638).

Almost surely, 2^125001251251 is an apocalyptic number.

125001251251 is a deficient number, since it is larger than the sum of its proper divisors (2417449853).

125001251251 is a wasteful number, since it uses less digits than its factorization.

125001251251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11566901.

The product of its (nonzero) digits is 1000, while the sum is 25.

Adding to 125001251251 its reverse (152152100521), we get a palindrome (277153351772).

The spelling of 125001251251 in words is "one hundred twenty-five billion, one million, two hundred fifty-one thousand, two hundred fifty-one".