8501381 has 4 divisors (see below), whose sum is σ = 9715872. Its totient is φ = 7286892.

The previous prime is 8501357. The next prime is 8501399. The reversal of 8501381 is 1831058.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8501381 - 2²² = 4307077 is a prime.

It is a super-2 number, since 2×8501381² = 144546957814322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8501381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8501351) 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, 607235 + ... + 607248.

It is an arithmetic number, because the mean of its divisors is an integer number (2428968).

Almost surely, 2^8501381 is an apocalyptic number.

It is an amenable number.

8501381 is a deficient number, since it is larger than the sum of its proper divisors (1214491).

8501381 is a wasteful number, since it uses less digits than its factorization.

8501381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1214490.

The product of its (nonzero) digits is 960, while the sum is 26.

The square root of 8501381 is about 2915.7127773496. The cubic root of 8501381 is about 204.0938069791.

The spelling of 8501381 in words is "eight million, five hundred one thousand, three hundred eighty-one".