102409001 has 2 divisors, whose sum is σ = 102409002. Its totient is φ = 102409000.

The previous prime is 102408991. The next prime is 102409009. The reversal of 102409001 is 100904201.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 69288976 + 33120025 = 8324^2 + 5755^2 .

It is a cyclic number.

It is not a de Polignac number, because 102409001 - 2⁶ = 102408937 is a prime.

It is not a weakly prime, because it can be changed into another prime (102409009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51204500 + 51204501.

It is an arithmetic number, because the mean of its divisors is an integer number (51204501).

Almost surely, 2^102409001 is an apocalyptic number.

It is an amenable number.

102409001 is a deficient number, since it is larger than the sum of its proper divisors (1).

102409001 is an equidigital number, since it uses as much as digits as its factorization.

102409001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 102409001 is about 10119.7332474725. The cubic root of 102409001 is about 467.8565455685.

The spelling of 102409001 in words is "one hundred two million, four hundred nine thousand, one".