1604087 has 2 divisors, whose sum is σ = 1604088. Its totient is φ = 1604086.

The previous prime is 1604081. The next prime is 1604093. The reversal of 1604087 is 7804061.

It is a balanced prime because it is at equal distance from previous prime (1604081) and next prime (1604093).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1604087 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1604081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 802043 + 802044.

It is an arithmetic number, because the mean of its divisors is an integer number (802044).

2^1604087 is an apocalyptic number.

1604087 is a deficient number, since it is larger than the sum of its proper divisors (1).

1604087 is an equidigital number, since it uses as much as digits as its factorization.

1604087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 1604087 is about 1266.5255623161. The cubic root of 1604087 is about 117.0602120251.

Subtracting from 1604087 its sum of digits (26), we obtain a palindrome (1604061).

The spelling of 1604087 in words is "one million, six hundred four thousand, eighty-seven".