1861492 has 6 divisors (see below), whose sum is σ = 3257618. Its totient is φ = 930744.

The previous prime is 1861471. The next prime is 1861493. The reversal of 1861492 is 2941681.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1094116 + 767376 = 1046^2 + 876^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1861493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 232683 + ... + 232690.

2^1861492 is an apocalyptic number.

It is an amenable number.

1861492 is a deficient number, since it is larger than the sum of its proper divisors (1396126).

1861492 is a wasteful number, since it uses less digits than its factorization.

1861492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 465377 (or 465375 counting only the distinct ones).

The product of its digits is 3456, while the sum is 31.

The square root of 1861492 is about 1364.3650537888. The cubic root of 1861492 is about 123.0137689215.

The spelling of 1861492 in words is "one million, eight hundred sixty-one thousand, four hundred ninety-two".