1890481 has 16 divisors (see below), whose sum is σ = 2131200. Its totient is φ = 1669248.

The previous prime is 1890479. The next prime is 1890487. The reversal of 1890481 is 1840981.

1890481 = 68² + 69² + ... + 181².

It is a cyclic number.

It is not a de Polignac number, because 1890481 - 2¹ = 1890479 is a prime.

It is a super-2 number, since 2×1890481² = 7147836822722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1890487) 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 15 ways as a sum of consecutive naturals, for example, 25861 + ... + 25933.

It is an arithmetic number, because the mean of its divisors is an integer number (133200).

2^1890481 is an apocalyptic number.

It is an amenable number.

1890481 is a deficient number, since it is larger than the sum of its proper divisors (240719).

1890481 is a wasteful number, since it uses less digits than its factorization.

1890481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168.

The product of its (nonzero) digits is 2304, while the sum is 31.

The square root of 1890481 is about 1374.9476353665. The cubic root of 1890481 is about 123.6490466667.

The spelling of 1890481 in words is "one million, eight hundred ninety thousand, four hundred eighty-one".