1252109 has 2 divisors, whose sum is σ = 1252110. Its totient is φ = 1252108.

The previous prime is 1252103. The next prime is 1252123. The reversal of 1252109 is 9012521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1188100 + 64009 = 1090^2 + 253^2 .

It is a cyclic number.

It is not a de Polignac number, because 1252109 - 2¹⁶ = 1186573 is a prime.

It is a Chen prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1252103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 626054 + 626055.

It is an arithmetic number, because the mean of its divisors is an integer number (626055).

2^1252109 is an apocalyptic number.

It is an amenable number.

1252109 is a deficient number, since it is larger than the sum of its proper divisors (1).

1252109 is an equidigital number, since it uses as much as digits as its factorization.

1252109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 1252109 is about 1118.9767647275. The cubic root of 1252109 is about 107.7822831653.

The spelling of 1252109 in words is "one million, two hundred fifty-two thousand, one hundred nine".