2261397 has 4 divisors (see below), whose sum is σ = 3015200. Its totient is φ = 1507596.

The previous prime is 2261393. The next prime is 2261407. The reversal of 2261397 is 7931622.

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 not a de Polignac number, because 2261397 - 2² = 2261393 is a prime.

It is a super-2 number, since 2×2261397² = 10227832783218, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2261393) 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, 376897 + ... + 376902.

It is an arithmetic number, because the mean of its divisors is an integer number (753800).

2^2261397 is an apocalyptic number.

It is an amenable number.

2261397 is a deficient number, since it is larger than the sum of its proper divisors (753803).

2261397 is an equidigital number, since it uses as much as digits as its factorization.

2261397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 753802.

The product of its digits is 4536, while the sum is 30.

The square root of 2261397 is about 1503.7942013454. The cubic root of 2261397 is about 131.2579460042.

The spelling of 2261397 in words is "two million, two hundred sixty-one thousand, three hundred ninety-seven".