1021965404 has 24 divisors (see below), whose sum is σ = 1894678128. Its totient is φ = 480661760.

The previous prime is 1021965401. The next prime is 1021965431. The reversal of 1021965404 is 4045691201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021965401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 183647 + ... + 189129.

It is an arithmetic number, because the mean of its divisors is an integer number (78944922).

Almost surely, 2^1021965404 is an apocalyptic number.

It is an amenable number.

1021965404 is a deficient number, since it is larger than the sum of its proper divisors (872712724).

1021965404 is a wasteful number, since it uses less digits than its factorization.

1021965404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8245 (or 8243 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 1021965404 is about 31968.1936305447. The cubic root of 1021965404 is about 1007.2688373186.

The spelling of 1021965404 in words is "one billion, twenty-one million, nine hundred sixty-five thousand, four hundred four".