1021401042 has 8 divisors (see below), whose sum is σ = 2042802096. Its totient is φ = 340467012.

The previous prime is 1021401041. The next prime is 1021401047. The reversal of 1021401042 is 2401041201.

It is a sphenic number, since it is the product of 3 distinct primes.

1021401042 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (1021401041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85116748 + ... + 85116759.

It is an arithmetic number, because the mean of its divisors is an integer number (255350262).

Almost surely, 2^1021401042 is an apocalyptic number.

1021401042 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1021401042 is a wasteful number, since it uses less digits than its factorization.

1021401042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170233512.

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 1021401042 is about 31959.3654818114. The cubic root of 1021401042 is about 1007.0833878155.

Adding to 1021401042 its reverse (2401041201), we get a palindrome (3422442243).

The spelling of 1021401042 in words is "one billion, twenty-one million, four hundred one thousand, forty-two".