1869481 has 4 divisors (see below), whose sum is σ = 1888852. Its totient is φ = 1850112.

The previous prime is 1869449. The next prime is 1869487. The reversal of 1869481 is 1849681.

It is a happy number.

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 1032256 + 837225 = 1016^2 + 915^2 .

It is a cyclic number.

It is not a de Polignac number, because 1869481 - 2⁵ = 1869449 is a prime.

It is a super-2 number, since 2×1869481² = 6989918418722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1869481.

It is not an unprimeable number, because it can be changed into a prime (1869487) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9540 + ... + 9733.

It is an arithmetic number, because the mean of its divisors is an integer number (472213).

2^1869481 is an apocalyptic number.

It is an amenable number.

1869481 is a deficient number, since it is larger than the sum of its proper divisors (19371).

1869481 is an equidigital number, since it uses as much as digits as its factorization.

1869481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19370.

The product of its digits is 13824, while the sum is 37.

The square root of 1869481 is about 1367.2896547550. The cubic root of 1869481 is about 123.1894979312.

The spelling of 1869481 in words is "one million, eight hundred sixty-nine thousand, four hundred eighty-one".