68251 has 4 divisors (see below), whose sum is σ = 68904. Its totient is φ = 67600.

The previous prime is 68239. The next prime is 68261. The reversal of 68251 is 15286.

It is a happy number.

68251 is nontrivially palindromic in base 15.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 15286 = 2 ⋅7643.

It is a 4-Lehmer number, since φ(68251) divides (68251-1)⁴.

It is a cyclic number.

It is not a de Polignac number, because 68251 - 2⁵ = 68219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68261) 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, 130 + ... + 391.

It is an arithmetic number, because the mean of its divisors is an integer number (17226).

2⁶⁸²⁵¹ is an apocalyptic number.

68251 is the 131-st decagonal number.

68251 is a deficient number, since it is larger than the sum of its proper divisors (653).

68251 is a wasteful number, since it uses less digits than its factorization.

68251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 652.

The product of its digits is 480, while the sum is 22.

The square root of 68251 is about 261.2489234428. The cubic root of 68251 is about 40.8667097191.

The spelling of 68251 in words is "sixty-eight thousand, two hundred fifty-one".