1151011243 has 4 divisors (see below), whose sum is σ = 1151079160. Its totient is φ = 1150943328.

The previous prime is 1151011237. The next prime is 1151011249. The reversal of 1151011243 is 3421101511.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 3421101511 = 37 ⋅92462203.

It is an interprime number because it is at equal distance from previous prime (1151011237) and next prime (1151011249).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1151011243 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 1151011243.

It is not an unprimeable number, because it can be changed into a prime (1151011249) 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, 14788 + ... + 50206.

It is an arithmetic number, because the mean of its divisors is an integer number (287769790).

Almost surely, 2^1151011243 is an apocalyptic number.

1151011243 is a deficient number, since it is larger than the sum of its proper divisors (67917).

1151011243 is an equidigital number, since it uses as much as digits as its factorization.

1151011243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67916.

The product of its (nonzero) digits is 120, while the sum is 19.

The square root of 1151011243 is about 33926.5566039349. The cubic root of 1151011243 is about 1047.9965555871.

Adding to 1151011243 its reverse (3421101511), we get a palindrome (4572112754).

The spelling of 1151011243 in words is "one billion, one hundred fifty-one million, eleven thousand, two hundred forty-three".