1243387 has 2 divisors, whose sum is σ = 1243388. Its totient is φ = 1243386.

The previous prime is 1243373. The next prime is 1243391. The reversal of 1243387 is 7833421.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1243387 is a prime.

It is a super-2 number, since 2×1243387² = 3092022463538, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1243337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621693 + 621694.

It is an arithmetic number, because the mean of its divisors is an integer number (621694).

2^1243387 is an apocalyptic number.

1243387 is a deficient number, since it is larger than the sum of its proper divisors (1).

1243387 is an equidigital number, since it uses as much as digits as its factorization.

1243387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4032, while the sum is 28.

The square root of 1243387 is about 1115.0726433735. The cubic root of 1243387 is about 107.5314348308.

The spelling of 1243387 in words is "one million, two hundred forty-three thousand, three hundred eighty-seven".