1151254661 has 8 divisors (see below), whose sum is σ = 1163735544. Its totient is φ = 1138795200.

The previous prime is 1151254591. The next prime is 1151254681. The reversal of 1151254661 is 1664521511.

It can be written as a sum of positive squares in 4 ways, for example, as 1705636 + 1149549025 = 1306^2 + 33905^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-1151254661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1151254681) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 117815 + ... + 127211.

It is an arithmetic number, because the mean of its divisors is an integer number (145466943).

Almost surely, 2^1151254661 is an apocalyptic number.

It is an amenable number.

1151254661 is a deficient number, since it is larger than the sum of its proper divisors (12480883).

1151254661 is a wasteful number, since it uses less digits than its factorization.

1151254661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10711.

The product of its digits is 7200, while the sum is 32.

The square root of 1151254661 is about 33930.1438399545. The cubic root of 1151254661 is about 1048.0704278006.

The spelling of 1151254661 in words is "one billion, one hundred fifty-one million, two hundred fifty-four thousand, six hundred sixty-one".