1021401242 has 16 divisors (see below), whose sum is σ = 1637392320. Its totient is φ = 476165568.

The previous prime is 1021401211. The next prime is 1021401287. The reversal of 1021401242 is 2421041201.

1021401242 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a self number, because there is not a number n which added to its sum of digits gives 1021401242.

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, 136742 + ... + 144017.

It is an arithmetic number, because the mean of its divisors is an integer number (102337020).

Almost surely, 2^1021401242 is an apocalyptic number.

1021401242 is a deficient number, since it is larger than the sum of its proper divisors (615991078).

1021401242 is a wasteful number, since it uses less digits than its factorization.

1021401242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280885.

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 1021401242 is about 31959.3686107845. The cubic root of 1021401242 is about 1007.0834535477.

Adding to 1021401242 its reverse (2421041201), we get a palindrome (3442442443).

The spelling of 1021401242 in words is "one billion, twenty-one million, four hundred one thousand, two hundred forty-two".