52140409 has 2 divisors, whose sum is σ = 52140410. Its totient is φ = 52140408.

The previous prime is 52140391. The next prime is 52140457. The reversal of 52140409 is 90404125.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27667600 + 24472809 = 5260^2 + 4947^2 .

It is a cyclic number.

It is not a de Polignac number, because 52140409 - 2⁹ = 52139897 is a prime.

It is not a weakly prime, because it can be changed into another prime (52141409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26070204 + 26070205.

It is an arithmetic number, because the mean of its divisors is an integer number (26070205).

Almost surely, 2^52140409 is an apocalyptic number.

It is an amenable number.

52140409 is a deficient number, since it is larger than the sum of its proper divisors (1).

52140409 is an equidigital number, since it uses as much as digits as its factorization.

52140409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 52140409 is about 7220.8316003075. The cubic root of 52140409 is about 373.5867613002.

The spelling of 52140409 in words is "fifty-two million, one hundred forty thousand, four hundred nine".