1861722 has 24 divisors (see below), whose sum is σ = 4058964. Its totient is φ = 616704.

The previous prime is 1861711. The next prime is 1861747. The reversal of 1861722 is 2271681.

It can be written as a sum of positive squares in 2 ways, for example, as 1766241 + 95481 = 1329^2 + 309^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5098 + ... + 5450.

2^1861722 is an apocalyptic number.

1861722 is an abundant number, since it is smaller than the sum of its proper divisors (2197242).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1861722 is a wasteful number, since it uses less digits than its factorization.

1861722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 654 (or 651 counting only the distinct ones).

The product of its digits is 1344, while the sum is 27.

The square root of 1861722 is about 1364.4493394773. The cubic root of 1861722 is about 123.0188351089.

The spelling of 1861722 in words is "one million, eight hundred sixty-one thousand, seven hundred twenty-two".