1301204243 has 4 divisors (see below), whose sum is σ = 1304890728. Its totient is φ = 1297517760.

The previous prime is 1301204239. The next prime is 1301204287. The reversal of 1301204243 is 3424021031.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3424021031 = 2447 ⋅1399273.

It is a cyclic number.

It is not a de Polignac number, because 1301204243 - 2² = 1301204239 is a prime.

It is a super-3 number, since 3×1301204243³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1301204143) 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, 1842713 + ... + 1843418.

It is an arithmetic number, because the mean of its divisors is an integer number (326222682).

Almost surely, 2^1301204243 is an apocalyptic number.

1301204243 is a deficient number, since it is larger than the sum of its proper divisors (3686485).

1301204243 is an equidigital number, since it uses as much as digits as its factorization.

1301204243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3686484.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 1301204243 is about 36072.2087347032. The cubic root of 1301204243 is about 1091.7297796298.

Adding to 1301204243 its reverse (3424021031), we get a palindrome (4725225274).

The spelling of 1301204243 in words is "one billion, three hundred one million, two hundred four thousand, two hundred forty-three".