138451 has 2 divisors, whose sum is σ = 138452. Its totient is φ = 138450.

The previous prime is 138449. The next prime is 138461. The reversal of 138451 is 154831.

138451 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 138451 - 2¹ = 138449 is a prime.

Together with 138449, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (138401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69225 + 69226.

It is an arithmetic number, because the mean of its divisors is an integer number (69226).

2¹³⁸⁴⁵¹ is an apocalyptic number.

138451 is a deficient number, since it is larger than the sum of its proper divisors (1).

138451 is an equidigital number, since it uses as much as digits as its factorization.

138451 is an odious number, because the sum of its binary digits is odd.

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

The square root of 138451 is about 372.0900428660. The cubic root of 138451 is about 51.7327262316.

It can be divided in two parts, 13 and 8451, that added together give a square (8464 = 92²).

The spelling of 138451 in words is "one hundred thirty-eight thousand, four hundred fifty-one".