1504409 has 2 divisors, whose sum is σ = 1504410. Its totient is φ = 1504408.

The previous prime is 1504379. The next prime is 1504411. The reversal of 1504409 is 9044051.

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., 1177225 + 327184 = 1085^2 + 572^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1504409 is a prime.

Together with 1504411, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1504429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 752204 + 752205.

It is an arithmetic number, because the mean of its divisors is an integer number (752205).

2^1504409 is an apocalyptic number.

It is an amenable number.

1504409 is a deficient number, since it is larger than the sum of its proper divisors (1).

1504409 is an equidigital number, since it uses as much as digits as its factorization.

1504409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 1504409 is about 1226.5435173690. The cubic root of 1504409 is about 114.5834711036.

The spelling of 1504409 in words is "one million, five hundred four thousand, four hundred nine".