1292978 has 8 divisors (see below), whose sum is σ = 1953840. Its totient is φ = 641700.

The previous prime is 1292971. The next prime is 1292983. The reversal of 1292978 is 8792921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (1292971) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2048 + ... + 2603.

It is an arithmetic number, because the mean of its divisors is an integer number (244230).

2^1292978 is an apocalyptic number.

1292978 is a deficient number, since it is larger than the sum of its proper divisors (660862).

1292978 is a wasteful number, since it uses less digits than its factorization.

1292978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4792.

The product of its digits is 18144, while the sum is 38.

The square root of 1292978 is about 1137.0919048168. The cubic root of 1292978 is about 108.9424267399.

The spelling of 1292978 in words is "one million, two hundred ninety-two thousand, nine hundred seventy-eight".