2261386 has 4 divisors (see below), whose sum is σ = 3392082. Its totient is φ = 1130692.

The previous prime is 2261377. The next prime is 2261393. The reversal of 2261386 is 6831622.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1863225 + 398161 = 1365^2 + 631^2 .

It is a super-2 number, since 2×2261386² = 10227733281992, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 565345 + ... + 565348.

2^2261386 is an apocalyptic number.

2261386 is a deficient number, since it is larger than the sum of its proper divisors (1130696).

2261386 is a wasteful number, since it uses less digits than its factorization.

2261386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1130695.

The product of its digits is 3456, while the sum is 28.

The square root of 2261386 is about 1503.7905439256. The cubic root of 2261386 is about 131.2577331800.

It can be divided in two parts, 226 and 1386, that multiplied together give a triangular number (313236 = T₇₉₁).

The spelling of 2261386 in words is "two million, two hundred sixty-one thousand, three hundred eighty-six".