252401389 has 2 divisors, whose sum is σ = 252401390. Its totient is φ = 252401388.

The previous prime is 252401353. The next prime is 252401399. The reversal of 252401389 is 983104252.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 248062500 + 4338889 = 15750^2 + 2083^2 .

It is a cyclic number.

It is not a de Polignac number, because 252401389 - 2¹¹ = 252399341 is a prime.

It is a super-2 number, since 2×252401389² = 127412922338258642, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (252401399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126200694 + 126200695.

It is an arithmetic number, because the mean of its divisors is an integer number (126200695).

Almost surely, 2^252401389 is an apocalyptic number.

It is an amenable number.

252401389 is a deficient number, since it is larger than the sum of its proper divisors (1).

252401389 is an equidigital number, since it uses as much as digits as its factorization.

252401389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 252401389 is about 15887.1454012356. The cubic root of 252401389 is about 631.9711412943.

The spelling of 252401389 in words is "two hundred fifty-two million, four hundred one thousand, three hundred eighty-nine".