1231032401 has 4 divisors (see below), whose sum is σ = 1295823600. Its totient is φ = 1166241204.

The previous prime is 1231032371. The next prime is 1231032403. The reversal of 1231032401 is 1042301321.

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 an emirpimes, since its reverse is a distinct semiprime: 1042301321 = 7349 ⋅141829.

It is a de Polignac number, because none of the positive numbers 2^k-1231032401 is a prime.

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 1231032401.

It is not an unprimeable number, because it can be changed into a prime (1231032403) 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, 32395571 + ... + 32395608.

It is an arithmetic number, because the mean of its divisors is an integer number (323955900).

Almost surely, 2^1231032401 is an apocalyptic number.

It is an amenable number.

1231032401 is a deficient number, since it is larger than the sum of its proper divisors (64791199).

1231032401 is an equidigital number, since it uses as much as digits as its factorization.

1231032401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64791198.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 1231032401 is about 35086.0713246724. The cubic root of 1231032401 is about 1071.7409574138.

Adding to 1231032401 its reverse (1042301321), we get a palindrome (2273333722).

The spelling of 1231032401 in words is "one billion, two hundred thirty-one million, thirty-two thousand, four hundred one".