1151266643 has 4 divisors (see below), whose sum is σ = 1151744208. Its totient is φ = 1150789080.

The previous prime is 1151266637. The next prime is 1151266661. The reversal of 1151266643 is 3466621511.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1151266643 - 2¹² = 1151262547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1151266243) 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, 235148 + ... + 239993.

It is an arithmetic number, because the mean of its divisors is an integer number (287936052).

Almost surely, 2^1151266643 is an apocalyptic number.

1151266643 is a deficient number, since it is larger than the sum of its proper divisors (477565).

1151266643 is an equidigital number, since it uses as much as digits as its factorization.

1151266643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 477564.

The product of its digits is 25920, while the sum is 35.

The square root of 1151266643 is about 33930.3204081541. The cubic root of 1151266643 is about 1048.0740638152.

The spelling of 1151266643 in words is "one billion, one hundred fifty-one million, two hundred sixty-six thousand, six hundred forty-three".