1142403020 has 48 divisors (see below), whose sum is σ = 2621547936. Its totient is φ = 414720000.

The previous prime is 1142403019. The next prime is 1142403023. The reversal of 1142403020 is 203042411.

It is a self number, because there is not a number n which added to its sum of digits gives 1142403020.

It is not an unprimeable number, because it can be changed into a prime (1142403023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 136970 + ... + 145070.

It is an arithmetic number, because the mean of its divisors is an integer number (54615582).

Almost surely, 2^1142403020 is an apocalyptic number.

1142403020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1142403020 is an abundant number, since it is smaller than the sum of its proper divisors (1479144916).

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

1142403020 is a wasteful number, since it uses less digits than its factorization.

1142403020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8762 (or 8760 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 1142403020 is about 33799.4529541530. The cubic root of 1142403020 is about 1045.3774176062.

Adding to 1142403020 its reverse (203042411), we get a palindrome (1345445431).

The spelling of 1142403020 in words is "one billion, one hundred forty-two million, four hundred three thousand, twenty".