71220425 has 12 divisors (see below), whose sum is σ = 88767756. Its totient is φ = 56683200.

The previous prime is 71220421. The next prime is 71220431. The reversal of 71220425 is 52402217.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 727609 + 70492816 = 853^2 + 8396^2 .

It is not a de Polignac number, because 71220425 - 2² = 71220421 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 71220425.

It is not an unprimeable number, because it can be changed into a prime (71220421) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2306 + ... + 12155.

It is an arithmetic number, because the mean of its divisors is an integer number (7397313).

Almost surely, 2^71220425 is an apocalyptic number.

It is an amenable number.

71220425 is a deficient number, since it is larger than the sum of its proper divisors (17547331).

71220425 is a wasteful number, since it uses less digits than its factorization.

71220425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14668 (or 14663 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 23.

The square root of 71220425 is about 8439.2194544282. The cubic root of 71220425 is about 414.5098485672.

The spelling of 71220425 in words is "seventy-one million, two hundred twenty thousand, four hundred twenty-five".