125440254413 has 4 divisors (see below), whose sum is σ = 127566360480. Its totient is φ = 123314148348.

The previous prime is 125440254397. The next prime is 125440254479. The reversal of 125440254413 is 314452044521.

It is a happy number.

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 125440254413 - 2⁴ = 125440254397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125440214413) 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, 1063052945 + ... + 1063053062.

It is an arithmetic number, because the mean of its divisors is an integer number (31891590120).

Almost surely, 2^125440254413 is an apocalyptic number.

It is an amenable number.

125440254413 is a deficient number, since it is larger than the sum of its proper divisors (2126106067).

125440254413 is an equidigital number, since it uses as much as digits as its factorization.

125440254413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2126106066.

The product of its (nonzero) digits is 76800, while the sum is 35.

Adding to 125440254413 its reverse (314452044521), we get a palindrome (439892298934).

The spelling of 125440254413 in words is "one hundred twenty-five billion, four hundred forty million, two hundred fifty-four thousand, four hundred thirteen".