1297242189 has 16 divisors (see below), whose sum is σ = 1966536000. Its totient is φ = 844715088.

The previous prime is 1297242169. The next prime is 1297242203. The reversal of 1297242189 is 9812427921.

It is not a de Polignac number, because 1297242189 - 2⁷ = 1297242061 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1297242169) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 557514 + ... + 559835.

It is an arithmetic number, because the mean of its divisors is an integer number (122908500).

Almost surely, 2^1297242189 is an apocalyptic number.

It is an amenable number.

1297242189 is a deficient number, since it is larger than the sum of its proper divisors (669293811).

1297242189 is a wasteful number, since it uses less digits than its factorization.

1297242189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1117401 (or 1117395 counting only the distinct ones).

The product of its digits is 145152, while the sum is 45.

The square root of 1297242189 is about 36017.2484929096. The cubic root of 1297242189 is about 1090.6205789144.

The spelling of 1297242189 in words is "one billion, two hundred ninety-seven million, two hundred forty-two thousand, one hundred eighty-nine".