124722881 has 4 divisors (see below), whose sum is σ = 129023700. Its totient is φ = 120422064.

The previous prime is 124722877. The next prime is 124722887. The reversal of 124722881 is 188227421.

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 52200625 + 72522256 = 7225^2 + 8516^2 .

It is a cyclic number.

It is not a de Polignac number, because 124722881 - 2² = 124722877 is a prime.

It is a super-2 number, since 2×124722881² = 31111594089880322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (124722887) 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, 2150366 + ... + 2150423.

It is an arithmetic number, because the mean of its divisors is an integer number (32255925).

Almost surely, 2^124722881 is an apocalyptic number.

It is an amenable number.

124722881 is a deficient number, since it is larger than the sum of its proper divisors (4300819).

124722881 is an equidigital number, since it uses as much as digits as its factorization.

124722881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4300818.

The product of its digits is 14336, while the sum is 35.

The square root of 124722881 is about 11167.9398726891. The cubic root of 124722881 is about 499.6302346145.

The spelling of 124722881 in words is "one hundred twenty-four million, seven hundred twenty-two thousand, eight hundred eighty-one".