145304091 has 16 divisors (see below), whose sum is σ = 218217120. Its totient is φ = 95541120.

The previous prime is 145304063. The next prime is 145304141. The reversal of 145304091 is 190403541.

145304091 is a `hidden beast` number, since 1 + 4 + 530 + 40 + 91 = 666.

It is not a de Polignac number, because 145304091 - 2¹⁷ = 145173019 is a prime.

It is a super-2 number, since 2×145304091² = 42226557722672562, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (145304011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34890 + ... + 38831.

It is an arithmetic number, because the mean of its divisors is an integer number (13638570).

Almost surely, 2^145304091 is an apocalyptic number.

145304091 is a deficient number, since it is larger than the sum of its proper divisors (72913029).

145304091 is an equidigital number, since it uses as much as digits as its factorization.

145304091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73803 (or 73797 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 145304091 is about 12054.2146571230. The cubic root of 145304091 is about 525.7257880063.

The spelling of 145304091 in words is "one hundred forty-five million, three hundred four thousand, ninety-one".