2626381 has 4 divisors (see below), whose sum is σ = 2780892. Its totient is φ = 2471872.

The previous prime is 2626367. The next prime is 2626399. The reversal of 2626381 is 1836262.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1836262 = 2 ⋅918131.

It can be written as a sum of positive squares in 2 ways, for example, as 828100 + 1798281 = 910^2 + 1341^2 .

It is a cyclic number.

It is not a de Polignac number, because 2626381 - 2⁹ = 2625869 is a prime.

It is a super-2 number, since 2×2626381² = 13795754314322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2626181) 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, 77230 + ... + 77263.

It is an arithmetic number, because the mean of its divisors is an integer number (695223).

2^2626381 is an apocalyptic number.

It is an amenable number.

2626381 is a deficient number, since it is larger than the sum of its proper divisors (154511).

2626381 is a wasteful number, since it uses less digits than its factorization.

2626381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154510.

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

The square root of 2626381 is about 1620.6113044157. The cubic root of 2626381 is about 137.9703955259.

The spelling of 2626381 in words is "two million, six hundred twenty-six thousand, three hundred eighty-one".