125405402415 has 8 divisors (see below), whose sum is σ = 200648643888. Its totient is φ = 66882881280.

The previous prime is 125405402359. The next prime is 125405402417. The reversal of 125405402415 is 514204504521.

It is a happy number.

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

It is not a de Polignac number, because 125405402415 - 2⁹ = 125405401903 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125405402417) 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, 4180180066 + ... + 4180180095.

It is an arithmetic number, because the mean of its divisors is an integer number (25081080486).

Almost surely, 2^125405402415 is an apocalyptic number.

125405402415 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

125405402415 is a deficient number, since it is larger than the sum of its proper divisors (75243241473).

125405402415 is an equidigital number, since it uses as much as digits as its factorization.

125405402415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8360360169.

The product of its (nonzero) digits is 32000, while the sum is 33.

Adding to 125405402415 its reverse (514204504521), we get a palindrome (639609906936).

The spelling of 125405402415 in words is "one hundred twenty-five billion, four hundred five million, four hundred two thousand, four hundred fifteen".