1861072 has 20 divisors (see below), whose sum is σ = 3695076. Its totient is φ = 907520.

The previous prime is 1861061. The next prime is 1861081. The reversal of 1861072 is 2701681.

It can be written as a sum of positive squares in 2 ways, for example, as 76176 + 1784896 = 276^2 + 1336^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 763 + ... + 2074.

2^1861072 is an apocalyptic number.

It is an amenable number.

1861072 is a deficient number, since it is larger than the sum of its proper divisors (1834004).

1861072 is a wasteful number, since it uses less digits than its factorization.

1861072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2886 (or 2880 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 25.

The square root of 1861072 is about 1364.2111273553. The cubic root of 1861072 is about 123.0045165460.

The spelling of 1861072 in words is "one million, eight hundred sixty-one thousand, seventy-two".