1672240 has 20 divisors (see below), whose sum is σ = 3888144. Its totient is φ = 668864.

The previous prime is 1672219. The next prime is 1672243. The reversal of 1672240 is 422761.

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (1672243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10372 + ... + 10531.

2^1672240 is an apocalyptic number.

1672240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1672240 is an abundant number, since it is smaller than the sum of its proper divisors (2215904).

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

1672240 is a wasteful number, since it uses less digits than its factorization.

1672240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20916 (or 20910 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 1672240 is about 1293.1511899233. The cubic root of 1672240 is about 118.6951214570.

The spelling of 1672240 in words is "one million, six hundred seventy-two thousand, two hundred forty".