84126731 has 4 divisors (see below), whose sum is σ = 90598032. Its totient is φ = 77655432.

The previous prime is 84126703. The next prime is 84126739. The reversal of 84126731 is 13762148.

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 84126731 - 2⁶ = 84126667 is a prime.

It is a super-2 number, since 2×84126731² = 14154613737492722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84126739) 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 3 ways as a sum of consecutive naturals, for example, 3235631 + ... + 3235656.

It is an arithmetic number, because the mean of its divisors is an integer number (22649508).

Almost surely, 2^84126731 is an apocalyptic number.

84126731 is a deficient number, since it is larger than the sum of its proper divisors (6471301).

84126731 is a wasteful number, since it uses less digits than its factorization.

84126731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6471300.

The product of its digits is 8064, while the sum is 32.

The square root of 84126731 is about 9172.0625270437. The cubic root of 84126731 is about 438.1720496846.

Adding to 84126731 its reverse (13762148), we get a palindrome (97888879).

It can be divided in two parts, 841 and 26731, that added together give a palindrome (27572).

The spelling of 84126731 in words is "eighty-four million, one hundred twenty-six thousand, seven hundred thirty-one".