125571215027 has 4 divisors (see below), whose sum is σ = 125572661496. Its totient is φ = 125569768560.

The previous prime is 125571215017. The next prime is 125571215047. The reversal of 125571215027 is 720512175521.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 720512175521 = 23 ⋅31326616327.

It is a cyclic number.

It is not a de Polignac number, because 125571215027 - 2⁶ = 125571214963 is a prime.

It is a super-2 number, since 2×125571215027² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125571215017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 584093 + ... + 769614.

It is an arithmetic number, because the mean of its divisors is an integer number (31393165374).

Almost surely, 2^125571215027 is an apocalyptic number.

125571215027 is a deficient number, since it is larger than the sum of its proper divisors (1446469).

125571215027 is an equidigital number, since it uses as much as digits as its factorization.

125571215027 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1446468.

The product of its (nonzero) digits is 49000, while the sum is 38.

The spelling of 125571215027 in words is "one hundred twenty-five billion, five hundred seventy-one million, two hundred fifteen thousand, twenty-seven".