124642181 has 16 divisors (see below), whose sum is σ = 134285040. Its totient is φ = 115276800.

The previous prime is 124642169. The next prime is 124642201. The reversal of 124642181 is 181246421.

It can be written as a sum of positive squares in 8 ways, for example, as 21436900 + 103205281 = 4630^2 + 10159^2 .

It is a cyclic number.

It is not a de Polignac number, because 124642181 - 2²⁶ = 57533317 is a prime.

It is a super-2 number, since 2×124642181² = 31071346568873522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (124642121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 393035 + ... + 393351.

It is an arithmetic number, because the mean of its divisors is an integer number (8392815).

Almost surely, 2^124642181 is an apocalyptic number.

It is an amenable number.

124642181 is a deficient number, since it is larger than the sum of its proper divisors (9642859).

124642181 is a wasteful number, since it uses less digits than its factorization.

124642181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 664.

The product of its digits is 3072, while the sum is 29.

The square root of 124642181 is about 11164.3262671780. The cubic root of 124642181 is about 499.5224520411.

The spelling of 124642181 in words is "one hundred twenty-four million, six hundred forty-two thousand, one hundred eighty-one".