1231142401 has 4 divisors (see below), whose sum is σ = 1270856704. Its totient is φ = 1191428100.

The previous prime is 1231142389. The next prime is 1231142447. The reversal of 1231142401 is 1042411321.

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.

It is a cyclic number.

It is not a de Polignac number, because 1231142401 - 2⁵ = 1231142369 is a prime.

It is a super-2 number, since 2×1231142401² = 3031423223080089602, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1231142461) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 19857105 + ... + 19857166.

It is an arithmetic number, because the mean of its divisors is an integer number (317714176).

Almost surely, 2^1231142401 is an apocalyptic number.

It is an amenable number.

1231142401 is a deficient number, since it is larger than the sum of its proper divisors (39714303).

1231142401 is an equidigital number, since it uses as much as digits as its factorization.

1231142401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39714302.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 1231142401 is about 35087.6388632806. The cubic root of 1231142401 is about 1071.7728785866.

Adding to 1231142401 its reverse (1042411321), we get a palindrome (2273553722).

The spelling of 1231142401 in words is "one billion, two hundred thirty-one million, one hundred forty-two thousand, four hundred one".