1641672 has 36 divisors (see below), whose sum is σ = 4475835. Its totient is φ = 543600.

The previous prime is 1641659. The next prime is 1641709. The reversal of 1641672 is 2761461.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in only one way, i.e., 820836 + 820836 = 906^2 + 906^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=906.

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 10797 + ... + 10947.

2^1641672 is an apocalyptic number.

1641672 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1641672

1641672 is an abundant number, since it is smaller than the sum of its proper divisors (2834163).

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

1641672 is a wasteful number, since it uses less digits than its factorization.

1641672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314 (or 156 counting only the distinct ones).

The product of its digits is 2016, while the sum is 27.

The square root of 1641672 is about 1281.2774875100. The cubic root of 1641672 is about 117.9674333186.

The spelling of 1641672 in words is "one million, six hundred forty-one thousand, six hundred seventy-two".