1142155225 has 12 divisors (see below), whose sum is σ = 1446407424. Its totient is φ = 894282320.

The previous prime is 1142155193. The next prime is 1142155237. The reversal of 1142155225 is 5225512411.

It is not a de Polignac number, because 1142155225 - 2⁵ = 1142155193 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1142155193 and 1142155202.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 484849 + ... + 487198.

It is an arithmetic number, because the mean of its divisors is an integer number (120533952).

Almost surely, 2^1142155225 is an apocalyptic number.

It is an amenable number.

1142155225 is a deficient number, since it is larger than the sum of its proper divisors (304252199).

1142155225 is an equidigital number, since it uses as much as digits as its factorization.

1142155225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 972104 (or 972099 counting only the distinct ones).

The product of its digits is 4000, while the sum is 28.

The square root of 1142155225 is about 33795.7870895175. The cubic root of 1142155225 is about 1045.3018289788.

Adding to 1142155225 its reverse (5225512411), we get a palindrome (6367667636).

The spelling of 1142155225 in words is "one billion, one hundred forty-two million, one hundred fifty-five thousand, two hundred twenty-five".