1667604 has 12 divisors (see below), whose sum is σ = 3891104. Its totient is φ = 555864.

The previous prime is 1667599. The next prime is 1667609. The reversal of 1667604 is 4067661.

It is an interprime number because it is at equal distance from previous prime (1667599) and next prime (1667609).

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1667609) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69472 + ... + 69495.

2^1667604 is an apocalyptic number.

It is an amenable number.

1667604 is an abundant number, since it is smaller than the sum of its proper divisors (2223500).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1667604 is a wasteful number, since it uses less digits than its factorization.

1667604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138974 (or 138972 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 1667604 is about 1291.3574253475. The cubic root of 1667604 is about 118.5853326153.

The spelling of 1667604 in words is "one million, six hundred sixty-seven thousand, six hundred four".