1123974921 has 8 divisors (see below), whose sum is σ = 1499274784. Its totient is φ = 748995840.

The previous prime is 1123974899. The next prime is 1123974923. The reversal of 1123974921 is 1294793211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1123974921 - 2⁶ = 1123974857 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1123974921.

It is not an unprimeable number, because it can be changed into a prime (1123974923) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71896 + ... + 86121.

It is an arithmetic number, because the mean of its divisors is an integer number (187409348).

Almost surely, 2^1123974921 is an apocalyptic number.

It is an amenable number.

1123974921 is a deficient number, since it is larger than the sum of its proper divisors (375299863).

1123974921 is a wasteful number, since it uses less digits than its factorization.

1123974921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160391.

The product of its digits is 27216, while the sum is 39.

The square root of 1123974921 is about 33525.7352044664. The cubic root of 1123974921 is about 1039.7259266081.

The spelling of 1123974921 in words is "one billion, one hundred twenty-three million, nine hundred seventy-four thousand, nine hundred twenty-one".