1021020142 has 16 divisors (see below), whose sum is σ = 1539801792. Its totient is φ = 507759840.

The previous prime is 1021020109. The next prime is 1021020149. The reversal of 1021020142 is 2410201201.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021020149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 417748 + ... + 420184.

It is an arithmetic number, because the mean of its divisors is an integer number (96237612).

Almost surely, 2^1021020142 is an apocalyptic number.

1021020142 is a deficient number, since it is larger than the sum of its proper divisors (518781650).

1021020142 is a wasteful number, since it uses less digits than its factorization.

1021020142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3483.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 1021020142 is about 31953.4057965657. The cubic root of 1021020142 is about 1006.9581853599.

Adding to 1021020142 its reverse (2410201201), we get a palindrome (3431221343).

The spelling of 1021020142 in words is "one billion, twenty-one million, twenty thousand, one hundred forty-two".