145796821 has 2 divisors, whose sum is σ = 145796822. Its totient is φ = 145796820.

The previous prime is 145796801. The next prime is 145796831. The reversal of 145796821 is 128697541.

145796821 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 86676100 + 59120721 = 9310^2 + 7689^2 .

It is a cyclic number.

It is not a de Polignac number, because 145796821 - 2²⁷ = 11579093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145796801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72898410 + 72898411.

It is an arithmetic number, because the mean of its divisors is an integer number (72898411).

Almost surely, 2^145796821 is an apocalyptic number.

It is an amenable number.

145796821 is a deficient number, since it is larger than the sum of its proper divisors (1).

145796821 is an equidigital number, since it uses as much as digits as its factorization.

145796821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120960, while the sum is 43.

The square root of 145796821 is about 12074.6354396313. The cubic root of 145796821 is about 526.3193675615.

The spelling of 145796821 in words is "one hundred forty-five million, seven hundred ninety-six thousand, eight hundred twenty-one".