1151155242 has 48 divisors (see below), whose sum is σ = 2630590560. Its totient is φ = 362810016.

The previous prime is 1151155189. The next prime is 1151155259. The reversal of 1151155242 is 2425511511.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 187473 + ... + 193515.

It is an arithmetic number, because the mean of its divisors is an integer number (54803970).

Almost surely, 2^1151155242 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1151155242, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1315295280).

1151155242 is an abundant number, since it is smaller than the sum of its proper divisors (1479435318).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1151155242 is a wasteful number, since it uses less digits than its factorization.

1151155242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6627 (or 6624 counting only the distinct ones).

The product of its digits is 2000, while the sum is 27.

The square root of 1151155242 is about 33928.6787541160. The cubic root of 1151155242 is about 1048.0402574954.

Adding to 1151155242 its reverse (2425511511), we get a palindrome (3576666753).

The spelling of 1151155242 in words is "one billion, one hundred fifty-one million, one hundred fifty-five thousand, two hundred forty-two".