1402400243 has 2 divisors, whose sum is σ = 1402400244. Its totient is φ = 1402400242.

The previous prime is 1402400221. The next prime is 1402400267. The reversal of 1402400243 is 3420042041.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1402400243 - 2²⁶ = 1335291379 is a prime.

It is not a weakly prime, because it can be changed into another prime (1402400143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 701200121 + 701200122.

It is an arithmetic number, because the mean of its divisors is an integer number (701200122).

Almost surely, 2^1402400243 is an apocalyptic number.

1402400243 is a deficient number, since it is larger than the sum of its proper divisors (1).

1402400243 is an equidigital number, since it uses as much as digits as its factorization.

1402400243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 1402400243 is about 37448.6347281179. The cubic root of 1402400243 is about 1119.3278926170.

Adding to 1402400243 its reverse (3420042041), we get a palindrome (4822442284).

The spelling of 1402400243 in words is "one billion, four hundred two million, four hundred thousand, two hundred forty-three".