11125409 has 2 divisors, whose sum is σ = 11125410. Its totient is φ = 11125408.

The previous prime is 11125379. The next prime is 11125423. The reversal of 11125409 is 90452111.

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., 5626384 + 5499025 = 2372^2 + 2345^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11125409 is a prime.

It is a super-3 number, since 3×11125409³ (a number of 22 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (11125459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5562704 + 5562705.

It is an arithmetic number, because the mean of its divisors is an integer number (5562705).

Almost surely, 2^11125409 is an apocalyptic number.

It is an amenable number.

11125409 is a deficient number, since it is larger than the sum of its proper divisors (1).

11125409 is an equidigital number, since it uses as much as digits as its factorization.

11125409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 360, while the sum is 23.

The square root of 11125409 is about 3335.4773271602. The cubic root of 11125409 is about 223.2399904472.

The spelling of 11125409 in words is "eleven million, one hundred twenty-five thousand, four hundred nine".