1540000012 has 48 divisors (see below), whose sum is σ = 2929530240. Its totient is φ = 705615872.

The previous prime is 1540000003. The next prime is 1540000013. The reversal of 1540000012 is 2100000451.

It is a junction number, because it is equal to n+sod(n) for n = 1539999947 and 1540000001.

It is not an unprimeable number, because it can be changed into a prime (1540000013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 492189 + ... + 495307.

It is an arithmetic number, because the mean of its divisors is an integer number (61031880).

Almost surely, 2^1540000012 is an apocalyptic number.

It is an amenable number.

1540000012 is a deficient number, since it is larger than the sum of its proper divisors (1389530228).

1540000012 is a wasteful number, since it uses less digits than its factorization.

1540000012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3330 (or 3328 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 13.

The square root of 1540000012 is about 39242.8338935913. The cubic root of 1540000012 is about 1154.8003532910.

Adding to 1540000012 its reverse (2100000451), we get a palindrome (3640000463).

The spelling of 1540000012 in words is "one billion, five hundred forty million, twelve", and thus it is an aban number.