125631573 has 4 divisors (see below), whose sum is σ = 167508768. Its totient is φ = 83754380.

The previous prime is 125631559. The next prime is 125631593. The reversal of 125631573 is 375136521.

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: 375136521 = 3 ⋅125045507.

It is a cyclic number.

It is not a de Polignac number, because 125631573 - 2⁹ = 125631061 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125631533) 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, 20938593 + ... + 20938598.

It is an arithmetic number, because the mean of its divisors is an integer number (41877192).

Almost surely, 2^125631573 is an apocalyptic number.

It is an amenable number.

125631573 is a deficient number, since it is larger than the sum of its proper divisors (41877195).

125631573 is an equidigital number, since it uses as much as digits as its factorization.

125631573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41877194.

The product of its digits is 18900, while the sum is 33.

The square root of 125631573 is about 11208.5491032515. The cubic root of 125631573 is about 500.8406830452.

The spelling of 125631573 in words is "one hundred twenty-five million, six hundred thirty-one thousand, five hundred seventy-three".