1155400242 has 8 divisors (see below), whose sum is σ = 2310800496. Its totient is φ = 385133412.

The previous prime is 1155400237. The next prime is 1155400249. The reversal of 1155400242 is 2420045511.

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

1155400242 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (1155400249) 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, 96283348 + ... + 96283359.

It is an arithmetic number, because the mean of its divisors is an integer number (288850062).

Almost surely, 2^1155400242 is an apocalyptic number.

1155400242 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1155400242 is a wasteful number, since it uses less digits than its factorization.

1155400242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192566712.

The product of its (nonzero) digits is 1600, while the sum is 24.

The square root of 1155400242 is about 33991.1788851167. The cubic root of 1155400242 is about 1049.3269282765.

Adding to 1155400242 its reverse (2420045511), we get a palindrome (3575445753).

The spelling of 1155400242 in words is "one billion, one hundred fifty-five million, four hundred thousand, two hundred forty-two".