1304535131 has 4 divisors (see below), whose sum is σ = 1307649000. Its totient is φ = 1301421264.

The previous prime is 1304535121. The next prime is 1304535143. The reversal of 1304535131 is 1315354031.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1315354031 = 449 ⋅2929519.

It is a cyclic number.

It is not a de Polignac number, because 1304535131 - 2²² = 1300340827 is a prime.

It is a super-2 number, since 2×1304535131² = 3403623816026374322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1304535131.

It is not an unprimeable number, because it can be changed into a prime (1304535121) 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, 1556306 + ... + 1557143.

It is an arithmetic number, because the mean of its divisors is an integer number (326912250).

Almost surely, 2^1304535131 is an apocalyptic number.

1304535131 is a deficient number, since it is larger than the sum of its proper divisors (3113869).

1304535131 is an equidigital number, since it uses as much as digits as its factorization.

1304535131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3113868.

The product of its (nonzero) digits is 2700, while the sum is 26.

The square root of 1304535131 is about 36118.3489517447. The cubic root of 1304535131 is about 1092.6605407925.

Adding to 1304535131 its reverse (1315354031), we get a palindrome (2619889162).

The spelling of 1304535131 in words is "one billion, three hundred four million, five hundred thirty-five thousand, one hundred thirty-one".