142121501 has 8 divisors (see below), whose sum is σ = 152138400. Its totient is φ = 132358320.

The previous prime is 142121491. The next prime is 142121527. The reversal of 142121501 is 105121241.

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

It is a cyclic number.

It is not a de Polignac number, because 142121501 - 2¹⁸ = 141859357 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 142121501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142121591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62270 + ... + 64511.

It is an arithmetic number, because the mean of its divisors is an integer number (19017300).

Almost surely, 2^142121501 is an apocalyptic number.

It is an amenable number.

142121501 is a deficient number, since it is larger than the sum of its proper divisors (10016899).

142121501 is a wasteful number, since it uses less digits than its factorization.

142121501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126859.

The product of its (nonzero) digits is 80, while the sum is 17.

The square root of 142121501 is about 11921.4722664611. The cubic root of 142121501 is about 521.8591011017.

Adding to 142121501 its reverse (105121241), we get a palindrome (247242742).

It can be divided in two parts, 1421 and 21501, that added together give a palindrome (22922).

The spelling of 142121501 in words is "one hundred forty-two million, one hundred twenty-one thousand, five hundred one".