1321040141 has 4 divisors (see below), whose sum is σ = 1321113984. Its totient is φ = 1320966300.

The previous prime is 1321040137. The next prime is 1321040179. The reversal of 1321040141 is 1410401231.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1321040141 - 2² = 1321040137 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321040111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8726 + ... + 52136.

It is an arithmetic number, because the mean of its divisors is an integer number (330278496).

Almost surely, 2^1321040141 is an apocalyptic number.

It is an amenable number.

1321040141 is a deficient number, since it is larger than the sum of its proper divisors (73843).

1321040141 is an equidigital number, since it uses as much as digits as its factorization.

1321040141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73842.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 1321040141 is about 36346.1158997767. The cubic root of 1321040141 is about 1097.2493647466.

Adding to 1321040141 its reverse (1410401231), we get a palindrome (2731441372).

The spelling of 1321040141 in words is "one billion, three hundred twenty-one million, forty thousand, one hundred forty-one".