145426186 has 4 divisors (see below), whose sum is σ = 218139282. Its totient is φ = 72713092.

The previous prime is 145426159. The next prime is 145426187. The reversal of 145426186 is 681624541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 681624541 = 13 ⋅52432657.

It can be written as a sum of positive squares in only one way, i.e., 73702225 + 71723961 = 8585^2 + 8469^2 .

It is a super-2 number, since 2×145426186² = 42297551149013192, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (145426187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36356545 + ... + 36356548.

Almost surely, 2^145426186 is an apocalyptic number.

145426186 is a deficient number, since it is larger than the sum of its proper divisors (72713096).

145426186 is an equidigital number, since it uses as much as digits as its factorization.

145426186 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72713095.

The product of its digits is 46080, while the sum is 37.

The square root of 145426186 is about 12059.2780049222. The cubic root of 145426186 is about 525.8729977176.

The spelling of 145426186 in words is "one hundred forty-five million, four hundred twenty-six thousand, one hundred eighty-six".