1151367261 has 16 divisors (see below), whose sum is σ = 1675909440. Its totient is φ = 697301120.

The previous prime is 1151367247. The next prime is 1151367271. The reversal of 1151367261 is 1627631511.

It is a cyclic number.

It is not a de Polignac number, because 1151367261 - 2⁵ = 1151367229 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1151367271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37585 + ... + 60953.

It is an arithmetic number, because the mean of its divisors is an integer number (104744340).

Almost surely, 2^1151367261 is an apocalyptic number.

1151367261 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1151367261 is a deficient number, since it is larger than the sum of its proper divisors (524542179).

1151367261 is a wasteful number, since it uses less digits than its factorization.

1151367261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24876.

The product of its digits is 7560, while the sum is 33.

The square root of 1151367261 is about 33931.8030909057. The cubic root of 1151367261 is about 1048.1045959960.

Adding to 1151367261 its reverse (1627631511), we get a palindrome (2778998772).

The spelling of 1151367261 in words is "one billion, one hundred fifty-one million, three hundred sixty-seven thousand, two hundred sixty-one".