145426191 has 4 divisors (see below), whose sum is σ = 193901592. Its totient is φ = 96950792.

The previous prime is 145426189. The next prime is 145426201. The reversal of 145426191 is 191624541.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 145426191 - 2¹ = 145426189 is a prime.

It is a super-2 number, since 2×145426191² = 42297554057536962, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145426111) 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, 24237696 + ... + 24237701.

It is an arithmetic number, because the mean of its divisors is an integer number (48475398).

Almost surely, 2^145426191 is an apocalyptic number.

145426191 is a deficient number, since it is larger than the sum of its proper divisors (48475401).

145426191 is an equidigital number, since it uses as much as digits as its factorization.

145426191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48475400.

The product of its digits is 8640, while the sum is 33.

The square root of 145426191 is about 12059.2782122314. The cubic root of 145426191 is about 525.8730037444.

The spelling of 145426191 in words is "one hundred forty-five million, four hundred twenty-six thousand, one hundred ninety-one".