70641 has 12 divisors (see below), whose sum is σ = 104832. Its totient is φ = 45816.

The previous prime is 70639. The next prime is 70657. The reversal of 70641 is 14607.

It is not a de Polignac number, because 70641 - 2¹ = 70639 is a prime.

It is an Ulam number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (70621) 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, 340 + ... + 506.

It is an arithmetic number, because the mean of its divisors is an integer number (8736).

2⁷⁰⁶⁴¹ is an apocalyptic number.

It is an amenable number.

70641 is a deficient number, since it is larger than the sum of its proper divisors (34191).

70641 is a wasteful number, since it uses less digits than its factorization.

70641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220 (or 217 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 70641 is about 265.7837466814. The cubic root of 70641 is about 41.3382682858.

It can be divided in two parts, 706 and 41, that added together give a palindrome (747).

The spelling of 70641 in words is "seventy thousand, six hundred forty-one".