71220994 has 12 divisors (see below), whose sum is σ = 115681986. Its totient is φ = 32871072.

The previous prime is 71220971. The next prime is 71220997. The reversal of 71220994 is 49902217.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 11730625 + 59490369 = 3425^2 + 7713^2 .

It is not an unprimeable number, because it can be changed into a prime (71220997) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 105019 + ... + 105694.

Almost surely, 2^71220994 is an apocalyptic number.

71220994 is a deficient number, since it is larger than the sum of its proper divisors (44460992).

71220994 is a wasteful number, since it uses less digits than its factorization.

71220994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210741 (or 210728 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 71220994 is about 8439.2531660094. The cubic root of 71220994 is about 414.5109524429.

The spelling of 71220994 in words is "seventy-one million, two hundred twenty thousand, nine hundred ninety-four".