1002135644 has 6 divisors (see below), whose sum is σ = 1753737384. Its totient is φ = 501067820.

The previous prime is 1002135643. The next prime is 1002135679. The reversal of 1002135644 is 4465312001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1002135643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125266952 + ... + 125266959.

It is an arithmetic number, because the mean of its divisors is an integer number (292289564).

Almost surely, 2^1002135644 is an apocalyptic number.

It is an amenable number.

1002135644 is a deficient number, since it is larger than the sum of its proper divisors (751601740).

1002135644 is a wasteful number, since it uses less digits than its factorization.

1002135644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250533915 (or 250533913 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 1002135644 is about 31656.5260886282. The cubic root of 1002135644 is about 1000.7113751587.

Adding to 1002135644 its reverse (4465312001), we get a palindrome (5467447645).

The spelling of 1002135644 in words is "one billion, two million, one hundred thirty-five thousand, six hundred forty-four".