1021967854 has 16 divisors (see below), whose sum is σ = 1550551392. Its totient is φ = 505135008.

The previous prime is 1021967797. The next prime is 1021967867. The reversal of 1021967854 is 4587691201.

It is a self number, because there is not a number n which added to its sum of digits gives 1021967854.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 122232 + ... + 130324.

It is an arithmetic number, because the mean of its divisors is an integer number (96909462).

Almost surely, 2^1021967854 is an apocalyptic number.

1021967854 is a deficient number, since it is larger than the sum of its proper divisors (528583538).

1021967854 is a wasteful number, since it uses less digits than its factorization.

1021967854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8811.

The product of its (nonzero) digits is 120960, while the sum is 43.

The square root of 1021967854 is about 31968.2319498592. The cubic root of 1021967854 is about 1007.2696422404.

The spelling of 1021967854 in words is "one billion, twenty-one million, nine hundred sixty-seven thousand, eight hundred fifty-four".