1672406 has 4 divisors (see below), whose sum is σ = 2508612. Its totient is φ = 836202.

The previous prime is 1672393. The next prime is 1672421. The reversal of 1672406 is 6042761.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6042761 = 811 ⋅7451.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 418100 + ... + 418103.

It is an arithmetic number, because the mean of its divisors is an integer number (627153).

2^1672406 is an apocalyptic number.

1672406 is a deficient number, since it is larger than the sum of its proper divisors (836206).

1672406 is an equidigital number, since it uses as much as digits as its factorization.

1672406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 836205.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 1672406 is about 1293.2153726275. The cubic root of 1672406 is about 118.6990488714.

The spelling of 1672406 in words is "one million, six hundred seventy-two thousand, four hundred six".