1073521812 has 48 divisors (see below), whose sum is σ = 2876428800. Its totient is φ = 308187360.

The previous prime is 1073521781. The next prime is 1073521843. The reversal of 1073521812 is 2181253701.

It is an interprime number because it is at equal distance from previous prime (1073521781) and next prime (1073521843).

It is a self number, because there is not a number n which added to its sum of digits gives 1073521812.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 211512 + ... + 216527.

It is an arithmetic number, because the mean of its divisors is an integer number (59925600).

Almost surely, 2^1073521812 is an apocalyptic number.

1073521812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1073521812 is an abundant number, since it is smaller than the sum of its proper divisors (1802906988).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1073521812 is a wasteful number, since it uses less digits than its factorization.

1073521812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428076 (or 428074 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 30.

The square root of 1073521812 is about 32764.6427113131. The cubic root of 1073521812 is about 1023.9300552913.

The spelling of 1073521812 in words is "one billion, seventy-three million, five hundred twenty-one thousand, eight hundred twelve".