1331241240 has 64 divisors (see below), whose sum is σ = 4564258560. Its totient is φ = 304283520.

The previous prime is 1331241229. The next prime is 1331241281. The reversal of 1331241240 is 421421331.

It is a super-3 number, since 3×1331241240³ (a number of 28 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 791566 + ... + 793245.

It is an arithmetic number, because the mean of its divisors is an integer number (71316540).

Almost surely, 2^1331241240 is an apocalyptic number.

1331241240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1331241240 is an abundant number, since it is smaller than the sum of its proper divisors (3233017320).

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

1331241240 is a wasteful number, since it uses less digits than its factorization.

1331241240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1584832 (or 1584828 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 1331241240 is about 36486.1787530566. The cubic root of 1331241240 is about 1100.0664532856.

Adding to 1331241240 its reverse (421421331), we get a palindrome (1752662571).

The spelling of 1331241240 in words is "one billion, three hundred thirty-one million, two hundred forty-one thousand, two hundred forty".