142545021 has 8 divisors (see below), whose sum is σ = 191198784. Its totient is φ = 94460640.

The previous prime is 142545001. The next prime is 142545023. The reversal of 142545021 is 120545241.

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

It is not a de Polignac number, because 142545021 - 2⁹ = 142544509 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 142544982 and 142545000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142545023) 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, 141760 + ... + 142761.

It is an arithmetic number, because the mean of its divisors is an integer number (23899848).

Almost surely, 2^142545021 is an apocalyptic number.

It is an amenable number.

142545021 is a deficient number, since it is larger than the sum of its proper divisors (48653763).

142545021 is a wasteful number, since it uses less digits than its factorization.

142545021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284691.

The product of its (nonzero) digits is 1600, while the sum is 24.

The square root of 142545021 is about 11939.2219595751. The cubic root of 142545021 is about 522.3769645365.

The spelling of 142545021 in words is "one hundred forty-two million, five hundred forty-five thousand, twenty-one".