2661431 has 8 divisors (see below), whose sum is σ = 2745600. Its totient is φ = 2578680.

The previous prime is 2661427. The next prime is 2661457. The reversal of 2661431 is 1341662.

It is a happy number.

2661431 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2661431 - 2² = 2661427 is a prime.

It is a super-2 number, since 2×2661431² = 14166429935522, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 2661397 and 2661406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2661481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4376 + ... + 4946.

It is an arithmetic number, because the mean of its divisors is an integer number (343200).

2^2661431 is an apocalyptic number.

2661431 is a deficient number, since it is larger than the sum of its proper divisors (84169).

2661431 is an equidigital number, since it uses as much as digits as its factorization.

2661431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 709.

The product of its digits is 864, while the sum is 23.

The square root of 2661431 is about 1631.3892852413. The cubic root of 2661431 is about 138.5814401969.

The spelling of 2661431 in words is "two million, six hundred sixty-one thousand, four hundred thirty-one".