146142821 has 4 divisors (see below), whose sum is σ = 159428544. Its totient is φ = 132857100.

The previous prime is 146142817. The next prime is 146142907. The reversal of 146142821 is 128241641.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 146142821 - 2² = 146142817 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (146142221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6642845 + ... + 6642866.

It is an arithmetic number, because the mean of its divisors is an integer number (39857136).

Almost surely, 2^146142821 is an apocalyptic number.

146142821 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

146142821 is a deficient number, since it is larger than the sum of its proper divisors (13285723).

146142821 is a wasteful number, since it uses less digits than its factorization.

146142821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13285722.

The product of its digits is 3072, while the sum is 29.

The square root of 146142821 is about 12088.9545040090. The cubic root of 146142821 is about 526.7353863134.

The spelling of 146142821 in words is "one hundred forty-six million, one hundred forty-two thousand, eight hundred twenty-one".