1012861040 has 20 divisors (see below), whose sum is σ = 2354902104. Its totient is φ = 405144384.

The previous prime is 1012860983. The next prime is 1012861103. The reversal of 1012861040 is 401682101.

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 1012860997 and 1012861015.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6330302 + ... + 6330461.

Almost surely, 2^1012861040 is an apocalyptic number.

1012861040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1012861040 is an abundant number, since it is smaller than the sum of its proper divisors (1342041064).

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

1012861040 is a wasteful number, since it uses less digits than its factorization.

1012861040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12660776 (or 12660770 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 23.

The square root of 1012861040 is about 31825.4778440167. The cubic root of 1012861040 is about 1004.2687650493.

The spelling of 1012861040 in words is "one billion, twelve million, eight hundred sixty-one thousand, forty".