281400001 has 2 divisors, whose sum is σ = 281400002. Its totient is φ = 281400000.

The previous prime is 281399999. The next prime is 281400011. The reversal of 281400001 is 100004182.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 194463025 + 86936976 = 13945^2 + 9324^2 .

It is a cyclic number.

It is not a de Polignac number, because 281400001 - 2¹ = 281399999 is a prime.

Together with 281399999, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (281400011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140700000 + 140700001.

It is an arithmetic number, because the mean of its divisors is an integer number (140700001).

Almost surely, 2^281400001 is an apocalyptic number.

It is an amenable number.

281400001 is a deficient number, since it is larger than the sum of its proper divisors (1).

281400001 is an equidigital number, since it uses as much as digits as its factorization.

281400001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 281400001 is about 16774.9814008839. The cubic root of 281400001 is about 655.3018060228.

Adding to 281400001 its reverse (100004182), we get a palindrome (381404183).

The spelling of 281400001 in words is "two hundred eighty-one million, four hundred thousand, one".