1890361 has 4 divisors (see below), whose sum is σ = 2062224. Its totient is φ = 1718500.

The previous prime is 1890337. The next prime is 1890373. The reversal of 1890361 is 1630981.

It is a happy number.

1890361 is nontrivially palindromic in base 6.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1890361 - 2¹³ = 1882169 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1890331) 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, 85915 + ... + 85936.

It is an arithmetic number, because the mean of its divisors is an integer number (515556).

2^1890361 is an apocalyptic number.

1890361 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1890361 is a deficient number, since it is larger than the sum of its proper divisors (171863).

1890361 is a wasteful number, since it uses less digits than its factorization.

1890361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171862.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 1890361 is about 1374.9039966485. The cubic root of 1890361 is about 123.6464303661.

The spelling of 1890361 in words is "one million, eight hundred ninety thousand, three hundred sixty-one".