71070642 has 32 divisors (see below), whose sum is σ = 167227200. Its totient is φ = 22296384.

The previous prime is 71070641. The next prime is 71070679. The reversal of 71070642 is 24607017.

71070642 is a `hidden beast` number, since 7 + 10 + 7 + 0 + 642 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (71070641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37792 + ... + 39627.

It is an arithmetic number, because the mean of its divisors is an integer number (5225850).

Almost surely, 2^71070642 is an apocalyptic number.

71070642 is an abundant number, since it is smaller than the sum of its proper divisors (96156558).

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

71070642 is a wasteful number, since it uses less digits than its factorization.

71070642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77447 (or 77441 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 27.

The square root of 71070642 is about 8430.3405625158. The cubic root of 71070642 is about 414.2190607111.

Adding to 71070642 its reverse (24607017), we get a palindrome (95677659).

The spelling of 71070642 in words is "seventy-one million, seventy thousand, six hundred forty-two".