1012145644 has 12 divisors (see below), whose sum is σ = 1788792768. Its totient is φ = 501062000.

The previous prime is 1012145593. The next prime is 1012145663. The reversal of 1012145644 is 4465412101.

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, 1252252 + ... + 1253059.

It is an arithmetic number, because the mean of its divisors is an integer number (149066064).

Almost surely, 2^1012145644 is an apocalyptic number.

It is an amenable number.

1012145644 is a deficient number, since it is larger than the sum of its proper divisors (776647124).

1012145644 is a wasteful number, since it uses less digits than its factorization.

1012145644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2505416 (or 2505414 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 1012145644 is about 31814.2364987752. The cubic root of 1012145644 is about 1004.0322669693.

Adding to 1012145644 its reverse (4465412101), we get a palindrome (5477557745).

The spelling of 1012145644 in words is "one billion, twelve million, one hundred forty-five thousand, six hundred forty-four".