1142021958 has 128 divisors (see below), whose sum is σ = 2968289280. Its totient is φ = 286624800.

The previous prime is 1142021941. The next prime is 1142021963. The reversal of 1142021958 is 8591202411.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1732633 + ... + 1733291.

It is an arithmetic number, because the mean of its divisors is an integer number (23189760).

Almost surely, 2^1142021958 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1142021958, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1484144640).

1142021958 is an abundant number, since it is smaller than the sum of its proper divisors (1826267322).

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

1142021958 is a wasteful number, since it uses less digits than its factorization.

1142021958 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 735 (or 713 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 33.

The square root of 1142021958 is about 33793.8153809244. The cubic root of 1142021958 is about 1045.2611720248.

The spelling of 1142021958 in words is "one billion, one hundred forty-two million, twenty-one thousand, nine hundred fifty-eight".