1861274 has 4 divisors (see below), whose sum is σ = 2791914. Its totient is φ = 930636.

The previous prime is 1861267. The next prime is 1861303. The reversal of 1861274 is 4721681.

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

It can be written as a sum of positive squares in only one way, i.e., 1288225 + 573049 = 1135^2 + 757^2 .

It is a Curzon number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 465317 + ... + 465320.

2^1861274 is an apocalyptic number.

1861274 is a deficient number, since it is larger than the sum of its proper divisors (930640).

1861274 is an equidigital number, since it uses as much as digits as its factorization.

1861274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 930639.

The product of its digits is 2688, while the sum is 29.

The square root of 1861274 is about 1364.2851608077. The cubic root of 1861274 is about 123.0089666718.

The spelling of 1861274 in words is "one million, eight hundred sixty-one thousand, two hundred seventy-four".