71605242 has 32 divisors (see below), whose sum is σ = 160300800. Its totient is φ = 23691744.

The previous prime is 71605223. The next prime is 71605253. The reversal of 71605242 is 24250617.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2559 + ... + 12237.

It is an arithmetic number, because the mean of its divisors is an integer number (5009400).

Almost surely, 2^71605242 is an apocalyptic number.

71605242 is an abundant number, since it is smaller than the sum of its proper divisors (88695558).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71605242 is a wasteful number, since it uses less digits than its factorization.

71605242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9827 (or 9821 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 71605242 is about 8461.9880642790. The cubic root of 71605242 is about 415.2550655357.

Adding to 71605242 its reverse (24250617), we get a palindrome (95855859).

The spelling of 71605242 in words is "seventy-one million, six hundred five thousand, two hundred forty-two".