2621431 has 2 divisors, whose sum is σ = 2621432. Its totient is φ = 2621430.

The previous prime is 2621387. The next prime is 2621447. The reversal of 2621431 is 1341262.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2621431 - 2⁷ = 2621303 is a prime.

It is a super-2 number, since 2×2621431² = 13743800975522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2621399 and 2621408.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2621131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1310715 + 1310716.

It is an arithmetic number, because the mean of its divisors is an integer number (1310716).

2^2621431 is an apocalyptic number.

2621431 is a deficient number, since it is larger than the sum of its proper divisors (1).

2621431 is an equidigital number, since it uses as much as digits as its factorization.

2621431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 288, while the sum is 19.

The square root of 2621431 is about 1619.0833826582. The cubic root of 2621431 is about 137.8836623664.

Adding to 2621431 its reverse (1341262), we get a palindrome (3962693).

It can be divided in two parts, 262143 and 1, that added together give a 18-th power (262144 = 2¹⁸).

The spelling of 2621431 in words is "two million, six hundred twenty-one thousand, four hundred thirty-one".