1155425144 has 8 divisors (see below), whose sum is σ = 2166422160. Its totient is φ = 577712568.

The previous prime is 1155425101. The next prime is 1155425147. The reversal of 1155425144 is 4415245511.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 1155425144.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1155425147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72214064 + ... + 72214079.

It is an arithmetic number, because the mean of its divisors is an integer number (270802770).

Almost surely, 2^1155425144 is an apocalyptic number.

It is an amenable number.

1155425144 is a deficient number, since it is larger than the sum of its proper divisors (1010997016).

1155425144 is a wasteful number, since it uses less digits than its factorization.

1155425144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144428149 (or 144428145 counting only the distinct ones).

The product of its digits is 16000, while the sum is 32.

The square root of 1155425144 is about 33991.5451840601. The cubic root of 1155425144 is about 1049.3344668334.

The spelling of 1155425144 in words is "one billion, one hundred fifty-five million, four hundred twenty-five thousand, one hundred forty-four".