124695661 has 4 divisors (see below), whose sum is σ = 128065852. Its totient is φ = 121325472.

The previous prime is 124695647. The next prime is 124695677. The reversal of 124695661 is 166596421.

It is a happy number.

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 53377636 + 71318025 = 7306^2 + 8445^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-124695661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (124695691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1685040 + ... + 1685113.

It is an arithmetic number, because the mean of its divisors is an integer number (32016463).

Almost surely, 2^124695661 is an apocalyptic number.

It is an amenable number.

124695661 is a deficient number, since it is larger than the sum of its proper divisors (3370191).

124695661 is an equidigital number, since it uses as much as digits as its factorization.

124695661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3370190.

The product of its digits is 77760, while the sum is 40.

The square root of 124695661 is about 11166.7211391706. The cubic root of 124695661 is about 499.5938848970.

The spelling of 124695661 in words is "one hundred twenty-four million, six hundred ninety-five thousand, six hundred sixty-one".