146487821 has 8 divisors (see below), whose sum is σ = 147642264. Its totient is φ = 145337920.

The previous prime is 146487811. The next prime is 146487823. The reversal of 146487821 is 128784641.

146487821 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 58690921 + 87796900 = 7661^2 + 9370^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-146487821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (146487823) 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, 90011 + ... + 91623.

It is an arithmetic number, because the mean of its divisors is an integer number (18455283).

Almost surely, 2^146487821 is an apocalyptic number.

It is an amenable number.

146487821 is a deficient number, since it is larger than the sum of its proper divisors (1154443).

146487821 is a wasteful number, since it uses less digits than its factorization.

146487821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2271.

The product of its digits is 86016, while the sum is 41.

The square root of 146487821 is about 12103.2153166008. The cubic root of 146487821 is about 527.1495494259.

The spelling of 146487821 in words is "one hundred forty-six million, four hundred eighty-seven thousand, eight hundred twenty-one".