1151251051 has 4 divisors (see below), whose sum is σ = 1151791912. Its totient is φ = 1150710192.

The previous prime is 1151251037. The next prime is 1151251091. The reversal of 1151251051 is 1501521511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1501521511 = 7 ⋅214503073.

It is a cyclic number.

It is not a de Polignac number, because 1151251051 - 2⁷ = 1151250923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1151251091) 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, 267225 + ... + 271498.

It is an arithmetic number, because the mean of its divisors is an integer number (287947978).

Almost surely, 2^1151251051 is an apocalyptic number.

1151251051 is a deficient number, since it is larger than the sum of its proper divisors (540861).

1151251051 is an equidigital number, since it uses as much as digits as its factorization.

1151251051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 540860.

The product of its (nonzero) digits is 250, while the sum is 22.

The square root of 1151251051 is about 33930.0906423782. The cubic root of 1151251051 is about 1048.0693323180.

Adding to 1151251051 its reverse (1501521511), we get a palindrome (2652772562).

The spelling of 1151251051 in words is "one billion, one hundred fifty-one million, two hundred fifty-one thousand, fifty-one".