1400738281 has 2 divisors, whose sum is σ = 1400738282. Its totient is φ = 1400738280.

The previous prime is 1400738237. The next prime is 1400738299. The reversal of 1400738281 is 1828370041.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1381237225 + 19501056 = 37165^2 + 4416^2 .

It is an emirp because it is prime and its reverse (1828370041) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1400738281 - 2¹⁵ = 1400705513 is a prime.

It is a super-2 number, since 2×1400738281² = 3924135463717669922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1400738081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 700369140 + 700369141.

It is an arithmetic number, because the mean of its divisors is an integer number (700369141).

Almost surely, 2^1400738281 is an apocalyptic number.

It is an amenable number.

1400738281 is a deficient number, since it is larger than the sum of its proper divisors (1).

1400738281 is an equidigital number, since it uses as much as digits as its factorization.

1400738281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10752, while the sum is 34.

The square root of 1400738281 is about 37426.4382622766. The cubic root of 1400738281 is about 1118.8855519991.

The spelling of 1400738281 in words is "one billion, four hundred million, seven hundred thirty-eight thousand, two hundred eighty-one".