1297143 has 12 divisors (see below), whose sum is σ = 1893528. Its totient is φ = 855600.

The previous prime is 1297139. The next prime is 1297147. The reversal of 1297143 is 3417921.

It is an interprime number because it is at equal distance from previous prime (1297139) and next prime (1297147).

It is not a de Polignac number, because 1297143 - 2² = 1297139 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1297147) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 196 + ... + 1622.

It is an arithmetic number, because the mean of its divisors is an integer number (157794).

2^1297143 is an apocalyptic number.

1297143 is a deficient number, since it is larger than the sum of its proper divisors (596385).

1297143 is a wasteful number, since it uses less digits than its factorization.

1297143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1534 (or 1531 counting only the distinct ones).

The product of its digits is 1512, while the sum is 27.

The square root of 1297143 is about 1138.9218586014. The cubic root of 1297143 is about 109.0592781401.

The spelling of 1297143 in words is "one million, two hundred ninety-seven thousand, one hundred forty-three".