2861091 has 12 divisors (see below), whose sum is σ = 4229368. Its totient is φ = 1862784.

The previous prime is 2861081. The next prime is 2861107. The reversal of 2861091 is 1901682.

It is not a de Polignac number, because 2861091 - 2⁵ = 2861059 is a prime.

It is a Duffinian number.

2861091 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2861041) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3310 + ... + 4083.

2^2861091 is an apocalyptic number.

2861091 is a deficient number, since it is larger than the sum of its proper divisors (1368277).

2861091 is a wasteful number, since it uses less digits than its factorization.

2861091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7442 (or 7439 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 2861091 is about 1691.4759826849. The cubic root of 2861091 is about 141.9636718548.

The spelling of 2861091 in words is "two million, eight hundred sixty-one thousand, ninety-one".