71626642 has 4 divisors (see below), whose sum is σ = 107439966. Its totient is φ = 35813320.

The previous prime is 71626613. The next prime is 71626673. The reversal of 71626642 is 24662617.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24662617 = 7 ⋅3523231.

It can be written as a sum of positive squares in only one way, i.e., 70744921 + 881721 = 8411^2 + 939^2 .

It is a junction number, because it is equal to n+sod(n) for n = 71626598 and 71626607.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 17906659 + ... + 17906662.

Almost surely, 2^71626642 is an apocalyptic number.

71626642 is a deficient number, since it is larger than the sum of its proper divisors (35813324).

71626642 is a wasteful number, since it uses less digits than its factorization.

71626642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35813323.

The product of its digits is 24192, while the sum is 34.

The square root of 71626642 is about 8463.2524480840. The cubic root of 71626642 is about 415.2964292359.

The spelling of 71626642 in words is "seventy-one million, six hundred twenty-six thousand, six hundred forty-two".