1012045100 has 72 divisors (see below), whose sum is σ = 2413387200. Its totient is φ = 365313600.

The previous prime is 1012045087. The next prime is 1012045121. The reversal of 1012045100 is 15402101.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 149591 + ... + 156209.

Almost surely, 2^1012045100 is an apocalyptic number.

1012045100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1012045100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1206693600).

1012045100 is an abundant number, since it is smaller than the sum of its proper divisors (1401342100).

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

1012045100 is a wasteful number, since it uses less digits than its factorization.

1012045100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6783 (or 6776 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 14.

The square root of 1012045100 is about 31812.6562864530. The cubic root of 1012045100 is about 1003.9990198559. Note that the first 3 decimals are identical.

Adding to 1012045100 its reverse (15402101), we get a palindrome (1027447201).

The spelling of 1012045100 in words is "one billion, twelve million, forty-five thousand, one hundred".