1001451243 has 12 divisors (see below), whose sum is σ = 1445883000. Its totient is φ = 616277376.

The previous prime is 1001451233. The next prime is 1001451247. The reversal of 1001451243 is 3421541001.

It is not a de Polignac number, because 1001451243 - 2⁶ = 1001451179 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1001451247) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 987118 + ... + 988131.

It is an arithmetic number, because the mean of its divisors is an integer number (120490250).

Almost surely, 2^1001451243 is an apocalyptic number.

1001451243 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1001451243 is a deficient number, since it is larger than the sum of its proper divisors (444431757).

1001451243 is a wasteful number, since it uses less digits than its factorization.

1001451243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1975278 (or 1975265 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 1001451243 is about 31645.7144491952. The cubic root of 1001451243 is about 1000.4835138434.

Adding to 1001451243 its reverse (3421541001), we get a palindrome (4422992244).

The spelling of 1001451243 in words is "one billion, one million, four hundred fifty-one thousand, two hundred forty-three".