125575381 has 4 divisors (see below), whose sum is σ = 125603500. Its totient is φ = 125547264.

The previous prime is 125575367. The next prime is 125575409. The reversal of 125575381 is 183575521.

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: 183575521 = 31 ⋅5921791.

It can be written as a sum of positive squares in 2 ways, for example, as 84088900 + 41486481 = 9170^2 + 6441^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125575381 is a prime.

It is a super-2 number, since 2×125575381² = 31538352626590322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 125575381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125575321) 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, 5706 + ... + 16843.

It is an arithmetic number, because the mean of its divisors is an integer number (31400875).

Almost surely, 2^125575381 is an apocalyptic number.

It is an amenable number.

125575381 is a deficient number, since it is larger than the sum of its proper divisors (28119).

125575381 is an equidigital number, since it uses as much as digits as its factorization.

125575381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28118.

The product of its digits is 42000, while the sum is 37.

The square root of 125575381 is about 11206.0421648323. The cubic root of 125575381 is about 500.7660005537.

It can be divided in two parts, 1255 and 75381, that added together give a triangular number (76636 = T₃₉₁).

The spelling of 125575381 in words is "one hundred twenty-five million, five hundred seventy-five thousand, three hundred eighty-one".