1431361 has 2 divisors, whose sum is σ = 1431362. Its totient is φ = 1431360.

The previous prime is 1431347. The next prime is 1431373. The reversal of 1431361 is 1631341.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 891136 + 540225 = 944^2 + 735^2 .

It is an emirp because it is prime and its reverse (1631341) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1431361 - 2¹⁷ = 1300289 is a prime.

It is not a weakly prime, because it can be changed into another prime (1431161) 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, 715680 + 715681.

It is an arithmetic number, because the mean of its divisors is an integer number (715681).

2^1431361 is an apocalyptic number.

1431361 is the 640-th centered heptagonal number.

It is an amenable number.

1431361 is a deficient number, since it is larger than the sum of its proper divisors (1).

1431361 is an equidigital number, since it uses as much as digits as its factorization.

1431361 is an odious number, because the sum of its binary digits is odd.

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

The square root of 1431361 is about 1196.3950016612. The cubic root of 1431361 is about 112.6980478548.

It can be divided in two parts, 14 and 31361, that added together give a triangular number (31375 = T₂₅₀).

The spelling of 1431361 in words is "one million, four hundred thirty-one thousand, three hundred sixty-one".