1020140242 has 16 divisors (see below), whose sum is σ = 1674664992. Its totient is φ = 462215520.

The previous prime is 1020140203. The next prime is 1020140257. The reversal of 1020140242 is 2420410201.

It is a super-2 number, since 2×1020140242² = 2081372226695637128, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67188 + ... + 80959.

It is an arithmetic number, because the mean of its divisors is an integer number (104666562).

Almost surely, 2^1020140242 is an apocalyptic number.

1020140242 is a deficient number, since it is larger than the sum of its proper divisors (654524750).

1020140242 is a wasteful number, since it uses less digits than its factorization.

1020140242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148473.

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 1020140242 is about 31939.6343435550. The cubic root of 1020140242 is about 1006.6688416884.

Adding to 1020140242 its reverse (2420410201), we get a palindrome (3440550443).

The spelling of 1020140242 in words is "one billion, twenty million, one hundred forty thousand, two hundred forty-two".