2291761 has 4 divisors (see below), whose sum is σ = 2412400. Its totient is φ = 2171124.

The previous prime is 2291749. The next prime is 2291797. The reversal of 2291761 is 1671922.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2291761 - 2²¹ = 194609 is a prime.

It is a super-2 number, since 2×2291761² = 10504336962242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2297761) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60291 + ... + 60328.

It is an arithmetic number, because the mean of its divisors is an integer number (603100).

2^2291761 is an apocalyptic number.

It is an amenable number.

2291761 is a deficient number, since it is larger than the sum of its proper divisors (120639).

2291761 is a wasteful number, since it uses less digits than its factorization.

2291761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120638.

The product of its digits is 1512, while the sum is 28.

The square root of 2291761 is about 1513.8563340027. The cubic root of 2291761 is about 131.8428072179.

The spelling of 2291761 in words is "two million, two hundred ninety-one thousand, seven hundred sixty-one".