2742631 has 4 divisors (see below), whose sum is σ = 2887000. Its totient is φ = 2598264.

The previous prime is 2742629. The next prime is 2742637. The reversal of 2742631 is 1362472.

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

It is a cyclic number.

It is not a de Polignac number, because 2742631 - 2¹ = 2742629 is a prime.

It is a super-2 number, since 2×2742631² = 15044049604322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2742596 and 2742605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2742637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72156 + ... + 72193.

It is an arithmetic number, because the mean of its divisors is an integer number (721750).

2^2742631 is an apocalyptic number.

2742631 is a deficient number, since it is larger than the sum of its proper divisors (144369).

2742631 is a wasteful number, since it uses less digits than its factorization.

2742631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144368.

The product of its digits is 2016, while the sum is 25.

The square root of 2742631 is about 1656.0890676531. The cubic root of 2742631 is about 139.9767138141.

The spelling of 2742631 in words is "two million, seven hundred forty-two thousand, six hundred thirty-one".