145804261 has 4 divisors (see below), whose sum is σ = 147980512. Its totient is φ = 143628012.

The previous prime is 145804259. The next prime is 145804273. The reversal of 145804261 is 162408541.

145804261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 145804261 - 2¹ = 145804259 is a prime.

It is a super-2 number, since 2×145804261² = 42517765051512242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145804201) 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, 1088025 + ... + 1088158.

It is an arithmetic number, because the mean of its divisors is an integer number (36995128).

Almost surely, 2^145804261 is an apocalyptic number.

It is an amenable number.

145804261 is a deficient number, since it is larger than the sum of its proper divisors (2176251).

145804261 is an equidigital number, since it uses as much as digits as its factorization.

145804261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2176250.

The product of its (nonzero) digits is 7680, while the sum is 31.

The square root of 145804261 is about 12074.9435195366. The cubic root of 145804261 is about 526.3283200875.

The spelling of 145804261 in words is "one hundred forty-five million, eight hundred four thousand, two hundred sixty-one".