1142551420 has 12 divisors (see below), whose sum is σ = 2399358024. Its totient is φ = 457020560.

The previous prime is 1142551391. The next prime is 1142551433. The reversal of 1142551420 is 241552411.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28563766 + ... + 28563805.

It is an arithmetic number, because the mean of its divisors is an integer number (199946502).

Almost surely, 2^1142551420 is an apocalyptic number.

1142551420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1142551420 is an abundant number, since it is smaller than the sum of its proper divisors (1256806604).

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

1142551420 is a wasteful number, since it uses less digits than its factorization.

1142551420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57127580 (or 57127578 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 25.

The square root of 1142551420 is about 33801.6481846670. The cubic root of 1142551420 is about 1045.4226810521.

Subtracting from 1142551420 its reverse (241552411), we obtain a palindrome (900999009).

The spelling of 1142551420 in words is "one billion, one hundred forty-two million, five hundred fifty-one thousand, four hundred twenty".