1421007878 has 8 divisors (see below), whose sum is σ = 2132167440. Its totient is φ = 710285400.

The previous prime is 1421007811. The next prime is 1421007881. The reversal of 1421007878 is 8787001241.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101018 + ... + 114221.

It is an arithmetic number, because the mean of its divisors is an integer number (266520930).

Almost surely, 2^1421007878 is an apocalyptic number.

1421007878 is a deficient number, since it is larger than the sum of its proper divisors (711159562).

1421007878 is a wasteful number, since it uses less digits than its factorization.

1421007878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218542.

The product of its (nonzero) digits is 25088, while the sum is 38.

The square root of 1421007878 is about 37696.2581432163. The cubic root of 1421007878 is about 1124.2567279356.

The spelling of 1421007878 in words is "one billion, four hundred twenty-one million, seven thousand, eight hundred seventy-eight".