252729401 has 2 divisors, whose sum is σ = 252729402. Its totient is φ = 252729400.

The previous prime is 252729377. The next prime is 252729409. The reversal of 252729401 is 104927252.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 178356025 + 74373376 = 13355^2 + 8624^2 .

It is a cyclic number.

It is not a de Polignac number, because 252729401 - 2²² = 248535097 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (252729409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126364700 + 126364701.

It is an arithmetic number, because the mean of its divisors is an integer number (126364701).

Almost surely, 2^252729401 is an apocalyptic number.

It is an amenable number.

252729401 is a deficient number, since it is larger than the sum of its proper divisors (1).

252729401 is an equidigital number, since it uses as much as digits as its factorization.

252729401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 252729401 is about 15897.4652382070. The cubic root of 252729401 is about 632.2447853053.

The spelling of 252729401 in words is "two hundred fifty-two million, seven hundred twenty-nine thousand, four hundred one".