124821091 has 4 divisors (see below), whose sum is σ = 128194672. Its totient is φ = 121447512.

The previous prime is 124821083. The next prime is 124821107. The reversal of 124821091 is 190128421.

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

It is a cyclic number.

It is not a de Polignac number, because 124821091 - 2³ = 124821083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (124821031) 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, 1686735 + ... + 1686808.

It is an arithmetic number, because the mean of its divisors is an integer number (32048668).

Almost surely, 2^124821091 is an apocalyptic number.

124821091 is a deficient number, since it is larger than the sum of its proper divisors (3373581).

124821091 is an equidigital number, since it uses as much as digits as its factorization.

124821091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3373580.

The product of its (nonzero) digits is 1152, while the sum is 28.

The square root of 124821091 is about 11172.3359688115. The cubic root of 124821091 is about 499.7613407683.

The spelling of 124821091 in words is "one hundred twenty-four million, eight hundred twenty-one thousand, ninety-one".