1001245231 has 4 divisors (see below), whose sum is σ = 1144280272. Its totient is φ = 858210192.

The previous prime is 1001245229. The next prime is 1001245237. The reversal of 1001245231 is 1325421001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1325421001 = 67 ⋅19782403.

It is not a de Polignac number, because 1001245231 - 2¹ = 1001245229 is a prime.

It is a super-2 number, since 2×1001245231² = 2004984025200486722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1001245199 and 1001245208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001245237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71517510 + ... + 71517523.

It is an arithmetic number, because the mean of its divisors is an integer number (286070068).

Almost surely, 2^1001245231 is an apocalyptic number.

1001245231 is a deficient number, since it is larger than the sum of its proper divisors (143035041).

1001245231 is an equidigital number, since it uses as much as digits as its factorization.

1001245231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143035040.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 1001245231 is about 31642.4593070766. The cubic root of 1001245231 is about 1000.4149048302.

Adding to 1001245231 its reverse (1325421001), we get a palindrome (2326666232).

The spelling of 1001245231 in words is "one billion, one million, two hundred forty-five thousand, two hundred thirty-one".