1042221042 has 24 divisors (see below), whose sum is σ = 2258749116. Its totient is φ = 347314176.

The previous prime is 1042221031. The next prime is 1042221043. The reversal of 1042221042 is 2401222401.

It can be written as a sum of positive squares in 2 ways, for example, as 870899121 + 171321921 = 29511^2 + 13089^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (1042221043) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 109498 + ... + 118634.

Almost surely, 2^1042221042 is an apocalyptic number.

1042221042 is an abundant number, since it is smaller than the sum of its proper divisors (1216528074).

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

1042221042 is a wasteful number, since it uses less digits than its factorization.

1042221042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15482 (or 15479 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 1042221042 is about 32283.4484217532. The cubic root of 1042221042 is about 1013.8801312502.

Adding to 1042221042 its reverse (2401222401), we get a palindrome (3443443443).

The spelling of 1042221042 in words is "one billion, forty-two million, two hundred twenty-one thousand, forty-two".