1665402 has 8 divisors (see below), whose sum is σ = 3330816. Its totient is φ = 555132.

The previous prime is 1665343. The next prime is 1665421. The reversal of 1665402 is 2045661.

It is a sphenic number, since it is the product of 3 distinct primes.

1665402 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138778 + ... + 138789.

It is an arithmetic number, because the mean of its divisors is an integer number (416352).

2^1665402 is an apocalyptic number.

1665402 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1665402 is a wasteful number, since it uses less digits than its factorization.

1665402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277572.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 1665402 is about 1290.5045524910. The cubic root of 1665402 is about 118.5331139987.

The spelling of 1665402 in words is "one million, six hundred sixty-five thousand, four hundred two".