1724138121 has 8 divisors (see below), whose sum is σ = 2398800960. Its totient is φ = 1099450352.

The previous prime is 1724138111. The next prime is 1724138137. The reversal of 1724138121 is 1218314271.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1724138121 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1724138111) 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, 12493686 + ... + 12493823.

It is an arithmetic number, because the mean of its divisors is an integer number (299850120).

Almost surely, 2^1724138121 is an apocalyptic number.

It is an amenable number.

1724138121 is a deficient number, since it is larger than the sum of its proper divisors (674662839).

1724138121 is a wasteful number, since it uses less digits than its factorization.

1724138121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24987535.

The product of its digits is 2688, while the sum is 30.

The square root of 1724138121 is about 41522.7422143577. The cubic root of 1724138121 is about 1199.1053797390.

The spelling of 1724138121 in words is "one billion, seven hundred twenty-four million, one hundred thirty-eight thousand, one hundred twenty-one".