1872261 has 16 divisors (see below), whose sum is σ = 2937600. Its totient is φ = 1174464.

The previous prime is 1872259. The next prime is 1872271. The reversal of 1872261 is 1622781.

It is not a de Polignac number, because 1872261 - 2¹ = 1872259 is a prime.

It is a super-2 number, since 2×1872261² = 7010722504242, which contains 22 as substring.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1872271) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1581 + ... + 2498.

It is an arithmetic number, because the mean of its divisors is an integer number (183600).

2^1872261 is an apocalyptic number.

It is an amenable number.

1872261 is a deficient number, since it is larger than the sum of its proper divisors (1065339).

1872261 is a wasteful number, since it uses less digits than its factorization.

1872261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4105 (or 4099 counting only the distinct ones).

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

The square root of 1872261 is about 1368.3058868543. The cubic root of 1872261 is about 123.2505304120.

The spelling of 1872261 in words is "one million, eight hundred seventy-two thousand, two hundred sixty-one".