1142155505 has 8 divisors (see below), whose sum is σ = 1430177472. Its totient is φ = 873997168.

The previous prime is 1142155501. The next prime is 1142155529. The reversal of 1142155505 is 5055512411.

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

It is a cyclic number.

It is not a de Polignac number, because 1142155505 - 2² = 1142155501 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1142155501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4965779 + ... + 4966008.

It is an arithmetic number, because the mean of its divisors is an integer number (178772184).

Almost surely, 2^1142155505 is an apocalyptic number.

It is an amenable number.

1142155505 is a deficient number, since it is larger than the sum of its proper divisors (288021967).

1142155505 is an equidigital number, since it uses as much as digits as its factorization.

1142155505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9931815.

The product of its (nonzero) digits is 5000, while the sum is 29.

The square root of 1142155505 is about 33795.7912320454. The cubic root of 1142155505 is about 1045.3019143976.

Adding to 1142155505 its reverse (5055512411), we get a palindrome (6197667916).

The spelling of 1142155505 in words is "one billion, one hundred forty-two million, one hundred fifty-five thousand, five hundred five".