1142261022 has 64 divisors (see below), whose sum is σ = 2677340160. Its totient is φ = 318110976.

The previous prime is 1142261017. The next prime is 1142261033. The reversal of 1142261022 is 2201622411.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 1142261022.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 545754 + ... + 547842.

It is an arithmetic number, because the mean of its divisors is an integer number (41833440).

Almost surely, 2^1142261022 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1142261022, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1338670080).

1142261022 is an abundant number, since it is smaller than the sum of its proper divisors (1535079138).

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

1142261022 is a wasteful number, since it uses less digits than its factorization.

1142261022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2425.

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 1142261022 is about 33797.3522927462. The cubic root of 1142261022 is about 1045.3341031626.

Adding to 1142261022 its reverse (2201622411), we get a palindrome (3343883433).

The spelling of 1142261022 in words is "one billion, one hundred forty-two million, two hundred sixty-one thousand, twenty-two".