1016721404 has 24 divisors (see below), whose sum is σ = 1828789200. Its totient is φ = 494398080.

The previous prime is 1016721379. The next prime is 1016721421. The reversal of 1016721404 is 4041276101.

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, 1694 + ... + 45125.

It is an arithmetic number, because the mean of its divisors is an integer number (76199550).

Almost surely, 2^1016721404 is an apocalyptic number.

It is an amenable number.

1016721404 is a deficient number, since it is larger than the sum of its proper divisors (812067796).

1016721404 is a wasteful number, since it uses less digits than its factorization.

1016721404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46973 (or 46971 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 1016721404 is about 31886.0691211695. The cubic root of 1016721404 is about 1005.5430194983.

Adding to 1016721404 its reverse (4041276101), we get a palindrome (5057997505).

The spelling of 1016721404 in words is "one billion, sixteen million, seven hundred twenty-one thousand, four hundred four".