1394522281 has 4 divisors (see below), whose sum is σ = 1417383364. Its totient is φ = 1371661200.

The previous prime is 1394522279. The next prime is 1394522303. The reversal of 1394522281 is 1822254931.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 434514025 + 960008256 = 20845^2 + 30984^2 .

It is a cyclic number.

It is not a de Polignac number, because 1394522281 - 2¹ = 1394522279 is a prime.

It is a super-2 number, since 2×1394522281² = 3889384784410885922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1394522281.

It is not an unprimeable number, because it can be changed into a prime (1394522881) 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, 11430450 + ... + 11430571.

It is an arithmetic number, because the mean of its divisors is an integer number (354345841).

Almost surely, 2^1394522281 is an apocalyptic number.

It is an amenable number.

1394522281 is a deficient number, since it is larger than the sum of its proper divisors (22861083).

1394522281 is an equidigital number, since it uses as much as digits as its factorization.

1394522281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22861082.

The product of its digits is 34560, while the sum is 37.

The square root of 1394522281 is about 37343.3030274506. The cubic root of 1394522281 is about 1117.2280198990.

The spelling of 1394522281 in words is "one billion, three hundred ninety-four million, five hundred twenty-two thousand, two hundred eighty-one".