145844091 has 8 divisors (see below), whose sum is σ = 216065360. Its totient is φ = 97229376.

The previous prime is 145844029. The next prime is 145844113. The reversal of 145844091 is 190448541.

It is not a de Polignac number, because 145844091 - 2⁷ = 145843963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145844021) 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, 2700790 + ... + 2700843.

It is an arithmetic number, because the mean of its divisors is an integer number (27008170).

Almost surely, 2^145844091 is an apocalyptic number.

145844091 is a deficient number, since it is larger than the sum of its proper divisors (70221269).

145844091 is an equidigital number, since it uses as much as digits as its factorization.

145844091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5401642 (or 5401636 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 145844091 is about 12076.5926899933. The cubic root of 145844091 is about 526.3762422086.

The spelling of 145844091 in words is "one hundred forty-five million, eight hundred forty-four thousand, ninety-one".