142021004 has 24 divisors (see below), whose sum is σ = 257658240. Its totient is φ = 68414976.

The previous prime is 142021001. The next prime is 142021031. The reversal of 142021004 is 400120241.

It is a self number, because there is not a number n which added to its sum of digits gives 142021004.

It is not an unprimeable number, because it can be changed into a prime (142021001) 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, 69404 + ... + 71420.

It is an arithmetic number, because the mean of its divisors is an integer number (10735760).

Almost surely, 2^142021004 is an apocalyptic number.

It is an amenable number.

142021004 is a deficient number, since it is larger than the sum of its proper divisors (115637236).

142021004 is a wasteful number, since it uses less digits than its factorization.

142021004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2657 (or 2655 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 142021004 is about 11917.2565634881. The cubic root of 142021004 is about 521.7360663737.

Adding to 142021004 its reverse (400120241), we get a palindrome (542141245).

The spelling of 142021004 in words is "one hundred forty-two million, twenty-one thousand, four".