145426091 has 4 divisors (see below), whose sum is σ = 147891000. Its totient is φ = 142961184.

The previous prime is 145426031. The next prime is 145426103. The reversal of 145426091 is 190624541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 190624541 = 109 ⋅1748849.

It is a cyclic number.

It is not a de Polignac number, because 145426091 - 2⁶ = 145426027 is a prime.

It is a super-2 number, since 2×145426091² = 42297495887080562, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145426031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1232366 + ... + 1232483.

It is an arithmetic number, because the mean of its divisors is an integer number (36972750).

Almost surely, 2^145426091 is an apocalyptic number.

145426091 is a deficient number, since it is larger than the sum of its proper divisors (2464909).

145426091 is an equidigital number, since it uses as much as digits as its factorization.

145426091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2464908.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 145426091 is about 12059.2740660456. The cubic root of 145426091 is about 525.8728832083.

The spelling of 145426091 in words is "one hundred forty-five million, four hundred twenty-six thousand, ninety-one".