1402309 has 2 divisors, whose sum is σ = 1402310. Its totient is φ = 1402308.

The previous prime is 1402301. The next prime is 1402361. The reversal of 1402309 is 9032041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1329409 + 72900 = 1153^2 + 270^2 .

It is an emirp because it is prime and its reverse (9032041) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1402309 - 2³ = 1402301 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1402301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 701154 + 701155.

It is an arithmetic number, because the mean of its divisors is an integer number (701155).

2^1402309 is an apocalyptic number.

It is an amenable number.

1402309 is a deficient number, since it is larger than the sum of its proper divisors (1).

1402309 is an equidigital number, since it uses as much as digits as its factorization.

1402309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 1402309 is about 1184.1912852238. The cubic root of 1402309 is about 111.9303616844.

It can be divided in two parts, 1402 and 309, that added together give a triangular number (1711 = T₅₈).

The spelling of 1402309 in words is "one million, four hundred two thousand, three hundred nine".