1671406 has 32 divisors (see below), whose sum is σ = 2993760. Its totient is φ = 691200.

The previous prime is 1671379. The next prime is 1671421. The reversal of 1671406 is 6041761.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15280 + ... + 15388.

It is an arithmetic number, because the mean of its divisors is an integer number (93555).

2^1671406 is an apocalyptic number.

1671406 is a deficient number, since it is larger than the sum of its proper divisors (1322354).

1671406 is a wasteful number, since it uses less digits than its factorization.

1671406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 1671406 is about 1292.8286816125. The cubic root of 1671406 is about 118.6753858145.

The spelling of 1671406 in words is "one million, six hundred seventy-one thousand, four hundred six".