1321042144 has 24 divisors (see below), whose sum is σ = 2616385968. Its totient is φ = 656563200.

The previous prime is 1321042057. The next prime is 1321042201. The reversal of 1321042144 is 4412401231.

It is a happy number.

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, 118257 + ... + 128944.

It is an arithmetic number, because the mean of its divisors is an integer number (109016082).

Almost surely, 2^1321042144 is an apocalyptic number.

It is an amenable number.

1321042144 is a deficient number, since it is larger than the sum of its proper divisors (1295343824).

1321042144 is a wasteful number, since it uses less digits than its factorization.

1321042144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247378 (or 247370 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 1321042144 is about 36346.1434542924. The cubic root of 1321042144 is about 1097.2499193069.

Adding to 1321042144 its reverse (4412401231), we get a palindrome (5733443375).

The spelling of 1321042144 in words is "one billion, three hundred twenty-one million, forty-two thousand, one hundred forty-four".