125622181 has 4 divisors (see below), whose sum is σ = 125815212. Its totient is φ = 125429152.

The previous prime is 125622179. The next prime is 125622187. The reversal of 125622181 is 181226521.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 53949025 + 71673156 = 7345^2 + 8466^2 .

It is a cyclic number.

It is not a de Polignac number, because 125622181 - 2¹ = 125622179 is a prime.

It is a super-2 number, since 2×125622181² = 31561864718393522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125622187) 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, 95536 + ... + 96841.

It is an arithmetic number, because the mean of its divisors is an integer number (31453803).

Almost surely, 2^125622181 is an apocalyptic number.

It is an amenable number.

125622181 is a deficient number, since it is larger than the sum of its proper divisors (193031).

125622181 is an equidigital number, since it uses as much as digits as its factorization.

125622181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193030.

The product of its digits is 1920, while the sum is 28.

The square root of 125622181 is about 11208.1301295087. The cubic root of 125622181 is about 500.8282020719.

The spelling of 125622181 in words is "one hundred twenty-five million, six hundred twenty-two thousand, one hundred eighty-one".