142451689 has 8 divisors (see below), whose sum is σ = 147479040. Its totient is φ = 137507616.

The previous prime is 142451681. The next prime is 142451693. The reversal of 142451689 is 986154241.

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 142451689 - 2³ = 142451681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142451681) 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, 17329 + ... + 24190.

It is an arithmetic number, because the mean of its divisors is an integer number (18434880).

Almost surely, 2^142451689 is an apocalyptic number.

It is an amenable number.

142451689 is a deficient number, since it is larger than the sum of its proper divisors (5027351).

142451689 is an equidigital number, since it uses as much as digits as its factorization.

142451689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41639.

The product of its digits is 69120, while the sum is 40.

The square root of 142451689 is about 11935.3126896617. The cubic root of 142451689 is about 522.2629300812.

The spelling of 142451689 in words is "one hundred forty-two million, four hundred fifty-one thousand, six hundred eighty-nine".