281421037 has 2 divisors, whose sum is σ = 281421038. Its totient is φ = 281421036.

The previous prime is 281421013. The next prime is 281421053. The reversal of 281421037 is 730124182.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 207907561 + 73513476 = 14419^2 + 8574^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-281421037 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 281420996 and 281421014.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (281421097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140710518 + 140710519.

It is an arithmetic number, because the mean of its divisors is an integer number (140710519).

Almost surely, 2^281421037 is an apocalyptic number.

It is an amenable number.

281421037 is a deficient number, since it is larger than the sum of its proper divisors (1).

281421037 is an equidigital number, since it uses as much as digits as its factorization.

281421037 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 281421037 is about 16775.6083943325. The cubic root of 281421037 is about 655.3181346005.

The spelling of 281421037 in words is "two hundred eighty-one million, four hundred twenty-one thousand, thirty-seven".