1670402 has 8 divisors (see below), whose sum is σ = 2573436. Its totient is φ = 812592.

The previous prime is 1670399. The next prime is 1670407. The reversal of 1670402 is 2040761.

It can be written as a sum of positive squares in 2 ways, for example, as 1666681 + 3721 = 1291^2 + 61^2 .

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

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1670407) 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, 11213 + ... + 11360.

2^1670402 is an apocalyptic number.

1670402 is a deficient number, since it is larger than the sum of its proper divisors (903034).

1670402 is a wasteful number, since it uses less digits than its factorization.

1670402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22612.

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 1670402 is about 1292.4403274426. The cubic root of 1670402 is about 118.6516186083.

The spelling of 1670402 in words is "one million, six hundred seventy thousand, four hundred two".