1421159978 has 8 divisors (see below), whose sum is σ = 2436274272. Its totient is φ = 609068556.

The previous prime is 1421159977. The next prime is 1421159989. The reversal of 1421159978 is 8799511241.

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 (1421159977) 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, 50755700 + ... + 50755727.

It is an arithmetic number, because the mean of its divisors is an integer number (304534284).

Almost surely, 2^1421159978 is an apocalyptic number.

1421159978 is a deficient number, since it is larger than the sum of its proper divisors (1015114294).

1421159978 is a wasteful number, since it uses less digits than its factorization.

1421159978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101511436.

The product of its digits is 181440, while the sum is 47.

The square root of 1421159978 is about 37698.2755308515. The cubic root of 1421159978 is about 1124.2968387495.

The spelling of 1421159978 in words is "one billion, four hundred twenty-one million, one hundred fifty-nine thousand, nine hundred seventy-eight".