70671571 has 4 divisors (see below), whose sum is σ = 73744272. Its totient is φ = 67598872.

The previous prime is 70671569. The next prime is 70671589. The reversal of 70671571 is 17517607.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17517607 = 3709 ⋅4723.

It is a cyclic number.

It is not a de Polignac number, because 70671571 - 2¹ = 70671569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70671511) 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, 1536316 + ... + 1536361.

It is an arithmetic number, because the mean of its divisors is an integer number (18436068).

Almost surely, 2^70671571 is an apocalyptic number.

70671571 is a deficient number, since it is larger than the sum of its proper divisors (3072701).

70671571 is a wasteful number, since it uses less digits than its factorization.

70671571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3072700.

The product of its (nonzero) digits is 10290, while the sum is 34.

The square root of 70671571 is about 8406.6385077509. The cubic root of 70671571 is about 413.4423068695.

The spelling of 70671571 in words is "seventy million, six hundred seventy-one thousand, five hundred seventy-one".