1012142540 has 24 divisors (see below), whose sum is σ = 2237368560. Its totient is φ = 383548608.

The previous prime is 1012142533. The next prime is 1012142563. The reversal of 1012142540 is 452412101.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1331387 + ... + 1332146.

It is an arithmetic number, because the mean of its divisors is an integer number (93223690).

Almost surely, 2^1012142540 is an apocalyptic number.

1012142540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1012142540 is an abundant number, since it is smaller than the sum of its proper divisors (1225226020).

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

1012142540 is a wasteful number, since it uses less digits than its factorization.

1012142540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2663561 (or 2663559 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 1012142540 is about 31814.1877155460. The cubic root of 1012142540 is about 1004.0312405955.

Adding to 1012142540 its reverse (452412101), we get a palindrome (1464554641).

The spelling of 1012142540 in words is "one billion, twelve million, one hundred forty-two thousand, five hundred forty".