125271971477 has 4 divisors (see below), whose sum is σ = 125474350080. Its totient is φ = 125069592876.

The previous prime is 125271971443. The next prime is 125271971491. The reversal of 125271971477 is 774179172521.

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, and also an emirpimes, since its reverse is a distinct semiprime: 774179172521 = 1163 ⋅665674267.

It is a cyclic number.

It is not a de Polignac number, because 125271971477 - 2⁶ = 125271971413 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 (125271971677) 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, 101188373 + ... + 101189610.

It is an arithmetic number, because the mean of its divisors is an integer number (31368587520).

Almost surely, 2^125271971477 is an apocalyptic number.

It is an amenable number.

125271971477 is a deficient number, since it is larger than the sum of its proper divisors (202378603).

125271971477 is an equidigital number, since it uses as much as digits as its factorization.

125271971477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202378602.

The product of its digits is 1728720, while the sum is 53.

The spelling of 125271971477 in words is "one hundred twenty-five billion, two hundred seventy-one million, nine hundred seventy-one thousand, four hundred seventy-seven".