724750121 has 2 divisors, whose sum is σ = 724750122. Its totient is φ = 724750120.

The previous prime is 724750093. The next prime is 724750123. The reversal of 724750121 is 121057427.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 406627225 + 318122896 = 20165^2 + 17836^2 .

It is a cyclic number.

It is not a de Polignac number, because 724750121 - 2¹⁸ = 724487977 is a prime.

Together with 724750123, 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 (724750123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 362375060 + 362375061.

It is an arithmetic number, because the mean of its divisors is an integer number (362375061).

Almost surely, 2^724750121 is an apocalyptic number.

It is an amenable number.

724750121 is a deficient number, since it is larger than the sum of its proper divisors (1).

724750121 is an equidigital number, since it uses as much as digits as its factorization.

724750121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3920, while the sum is 29.

The square root of 724750121 is about 26921.1834992446. The cubic root of 724750121 is about 898.2476689662.

The spelling of 724750121 in words is "seven hundred twenty-four million, seven hundred fifty thousand, one hundred twenty-one".