1331402144 has 12 divisors (see below), whose sum is σ = 2621198034. Its totient is φ = 665701056.

The previous prime is 1331402129. The next prime is 1331402161. The reversal of 1331402144 is 4412041331.

It can be written as a sum of positive squares in only one way, i.e., 1243267600 + 88134544 = 35260^2 + 9388^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20803127 + ... + 20803190.

Almost surely, 2^1331402144 is an apocalyptic number.

It is an amenable number.

1331402144 is a deficient number, since it is larger than the sum of its proper divisors (1289795890).

1331402144 is an equidigital number, since it uses as much as digits as its factorization.

1331402144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41606327 (or 41606319 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 1331402144 is about 36488.3836857705. The cubic root of 1331402144 is about 1100.1107723157.

Adding to 1331402144 its reverse (4412041331), we get a palindrome (5743443475).

The spelling of 1331402144 in words is "one billion, three hundred thirty-one million, four hundred two thousand, one hundred forty-four".