1042221402 has 96 divisors (see below), whose sum is σ = 2548091520. Its totient is φ = 306218880.

The previous prime is 1042221377. The next prime is 1042221403. The reversal of 1042221402 is 2041222401.

1042221402 is a `hidden beast` number, since 1 + 0 + 42 + 221 + 402 = 666.

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 (1042221403) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 289252 + ... + 292832.

It is an arithmetic number, because the mean of its divisors is an integer number (26542620).

Almost surely, 2^1042221402 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1042221402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1274045760).

1042221402 is an abundant number, since it is smaller than the sum of its proper divisors (1505870118).

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

1042221402 is a wasteful number, since it uses less digits than its factorization.

1042221402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3668 (or 3665 counting only the distinct ones).

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

The square root of 1042221402 is about 32283.4539973653. The cubic root of 1042221402 is about 1013.8802479870.

Adding to 1042221402 its reverse (2041222401), we get a palindrome (3083443803).

Subtracting 1042221402 from its reverse (2041222401), we obtain a palindrome (999000999).

The spelling of 1042221402 in words is "one billion, forty-two million, two hundred twenty-one thousand, four hundred two".