142468921 has 6 divisors (see below), whose sum is σ = 165729210. Its totient is φ = 122116176.

The previous prime is 142468889. The next prime is 142468927. The reversal of 142468921 is 129864241.

It can be written as a sum of positive squares in only one way, i.e., 117418896 + 25050025 = 10836^2 + 5005^2 .

It is not a de Polignac number, because 142468921 - 2⁵ = 142468889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142468927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1453716 + ... + 1453813.

It is an arithmetic number, because the mean of its divisors is an integer number (27621535).

Almost surely, 2^142468921 is an apocalyptic number.

It is an amenable number.

142468921 is a deficient number, since it is larger than the sum of its proper divisors (23260289).

142468921 is an equidigital number, since it uses as much as digits as its factorization.

142468921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2907543 (or 2907536 counting only the distinct ones).

The product of its digits is 27648, while the sum is 37.

The square root of 142468921 is about 11936.0345592663. The cubic root of 142468921 is about 522.2839881490.

The spelling of 142468921 in words is "one hundred forty-two million, four hundred sixty-eight thousand, nine hundred twenty-one".