8742631 has 4 divisors (see below), whose sum is σ = 8945992. Its totient is φ = 8539272.

The previous prime is 8742623. The next prime is 8742637. The reversal of 8742631 is 1362478.

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 8742631 - 2³ = 8742623 is a prime.

It is a super-2 number, since 2×8742631² = 152867193604322, 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 = 8742593 and 8742602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8742637) 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, 101616 + ... + 101701.

It is an arithmetic number, because the mean of its divisors is an integer number (2236498).

Almost surely, 2^8742631 is an apocalyptic number.

8742631 is a deficient number, since it is larger than the sum of its proper divisors (203361).

8742631 is a wasteful number, since it uses less digits than its factorization.

8742631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203360.

The product of its digits is 8064, while the sum is 31.

The square root of 8742631 is about 2956.7940408490. The cubic root of 8742631 is about 206.0064015983.

The spelling of 8742631 in words is "eight million, seven hundred forty-two thousand, six hundred thirty-one".