123754721 has 2 divisors, whose sum is σ = 123754722. Its totient is φ = 123754720.

The previous prime is 123754711. The next prime is 123754723. The reversal of 123754721 is 127457321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 117180625 + 6574096 = 10825^2 + 2564^2 .

It is a cyclic number.

It is not a de Polignac number, because 123754721 - 2¹⁰ = 123753697 is a prime.

Together with 123754723, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (123754723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61877360 + 61877361.

It is an arithmetic number, because the mean of its divisors is an integer number (61877361).

Almost surely, 2^123754721 is an apocalyptic number.

It is an amenable number.

123754721 is a deficient number, since it is larger than the sum of its proper divisors (1).

123754721 is an equidigital number, since it uses as much as digits as its factorization.

123754721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11760, while the sum is 32.

The square root of 123754721 is about 11124.5099217898. The cubic root of 123754721 is about 498.3340836097.

The spelling of 123754721 in words is "one hundred twenty-three million, seven hundred fifty-four thousand, seven hundred twenty-one".