1091245156 has 27 divisors (see below), whose sum is σ = 1942726611. Its totient is φ = 536340024.

The previous prime is 1091245153. The next prime is 1091245187. The reversal of 1091245156 is 6515421901.

It is a happy number.

The square root of 1091245156 is 33034.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1091245151) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 5483545 + ... + 5483743.

Almost surely, 2^1091245156 is an apocalyptic number.

1091245156 is the 33034-th square number.

It is an amenable number.

1091245156 is a deficient number, since it is larger than the sum of its proper divisors (851481455).

1091245156 is an frugal number, since it uses more digits than its factorization.

1091245156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 568 (or 284 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 34.

The cubic root of 1091245156 is about 1029.5341960139.

The spelling of 1091245156 in words is "one billion, ninety-one million, two hundred forty-five thousand, one hundred fifty-six".