201451 has 2 divisors, whose sum is σ = 201452. Its totient is φ = 201450.

The previous prime is 201449. The next prime is 201473. The reversal of 201451 is 154102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 201451 - 2¹ = 201449 is a prime.

Together with 201449, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (201401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100725 + 100726.

It is an arithmetic number, because the mean of its divisors is an integer number (100726).

2²⁰¹⁴⁵¹ is an apocalyptic number.

201451 is a deficient number, since it is larger than the sum of its proper divisors (1).

201451 is an equidigital number, since it uses as much as digits as its factorization.

201451 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40, while the sum is 13.

The square root of 201451 is about 448.8329310556. The cubic root of 201451 is about 58.6214391146.

Adding to 201451 its reverse (154102), we get a palindrome (355553).

The spelling of 201451 in words is "two hundred one thousand, four hundred fifty-one".