1880621 has 4 divisors (see below), whose sum is σ = 1945500. Its totient is φ = 1815744.

The previous prime is 1880603. The next prime is 1880633. The reversal of 1880621 is 1260881.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 902500 + 978121 = 950^2 + 989^2 .

It is a cyclic number.

It is not a de Polignac number, because 1880621 - 2¹⁰ = 1879597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1880321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32396 + ... + 32453.

It is an arithmetic number, because the mean of its divisors is an integer number (486375).

2^1880621 is an apocalyptic number.

It is an amenable number.

1880621 is a deficient number, since it is larger than the sum of its proper divisors (64879).

1880621 is an equidigital number, since it uses as much as digits as its factorization.

1880621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64878.

The product of its (nonzero) digits is 768, while the sum is 26.

The square root of 1880621 is about 1371.3573567820. The cubic root of 1880621 is about 123.4337037021.

The spelling of 1880621 in words is "one million, eight hundred eighty thousand, six hundred twenty-one".