71220634 has 8 divisors (see below), whose sum is σ = 109718388. Its totient is φ = 34647840.

The previous prime is 71220619. The next prime is 71220637. The reversal of 71220634 is 43602217.

It can be written as a sum of positive squares in 2 ways, for example, as 56205009 + 15015625 = 7497^2 + 3875^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 71220599 and 71220608.

It is not an unprimeable number, because it can be changed into a prime (71220637) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 481147 + ... + 481294.

Almost surely, 2^71220634 is an apocalyptic number.

71220634 is a gapful number since it is divisible by the number (74) formed by its first and last digit.

71220634 is a deficient number, since it is larger than the sum of its proper divisors (38497754).

71220634 is a wasteful number, since it uses less digits than its factorization.

71220634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 962480.

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 71220634 is about 8439.2318370809. The cubic root of 71220634 is about 414.5102540336.

The spelling of 71220634 in words is "seventy-one million, two hundred twenty thousand, six hundred thirty-four".