1861461 has 40 divisors (see below), whose sum is σ = 3291200. Its totient is φ = 1047816.

The previous prime is 1861417. The next prime is 1861469. The reversal of 1861461 is 1641681.

It is not a de Polignac number, because 1861461 - 2⁶ = 1861397 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

1861461 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1861469) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 27750 + ... + 27816.

It is an arithmetic number, because the mean of its divisors is an integer number (82280).

2^1861461 is an apocalyptic number.

It is an amenable number.

1861461 is a deficient number, since it is larger than the sum of its proper divisors (1429739).

1861461 is an frugal number, since it uses more digits than its factorization.

1861461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100 (or 77 counting only the distinct ones).

The product of its digits is 1152, while the sum is 27.

The square root of 1861461 is about 1364.3536931456. The cubic root of 1861461 is about 123.0130860557.

The spelling of 1861461 in words is "one million, eight hundred sixty-one thousand, four hundred sixty-one".