1142155400 has 48 divisors (see below), whose sum is σ = 2657800500. Its totient is φ = 456468480.

The previous prime is 1142155381. The next prime is 1142155411. The reversal of 1142155400 is 45512411.

It can be written as a sum of positive squares in 6 ways, for example, as 13060996 + 1129094404 = 3614^2 + 33602^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 373076 + ... + 376124.

Almost surely, 2^1142155400 is an apocalyptic number.

1142155400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1142155400 is an abundant number, since it is smaller than the sum of its proper divisors (1515645100).

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

1142155400 is a wasteful number, since it uses less digits than its factorization.

1142155400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4938 (or 4929 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 23.

The square root of 1142155400 is about 33795.7896785975. The cubic root of 1142155400 is about 1045.3018823655.

Adding to 1142155400 its reverse (45512411), we get a palindrome (1187667811).

The spelling of 1142155400 in words is "one billion, one hundred forty-two million, one hundred fifty-five thousand, four hundred".