145686419 has 4 divisors (see below), whose sum is σ = 146201496. Its totient is φ = 145171344.

The previous prime is 145686403. The next prime is 145686421. The reversal of 145686419 is 914686541.

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 145686419 - 2⁴ = 145686403 is a prime.

It is a super-2 number, since 2×145686419² = 42449065362087122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 145686419.

It is not an unprimeable number, because it can be changed into a prime (145686449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 257114 + ... + 257679.

It is an arithmetic number, because the mean of its divisors is an integer number (36550374).

Almost surely, 2^145686419 is an apocalyptic number.

145686419 is a deficient number, since it is larger than the sum of its proper divisors (515077).

145686419 is an equidigital number, since it uses as much as digits as its factorization.

145686419 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 515076.

The product of its digits is 207360, while the sum is 44.

The square root of 145686419 is about 12070.0629244424. The cubic root of 145686419 is about 526.1864854146.

The spelling of 145686419 in words is "one hundred forty-five million, six hundred eighty-six thousand, four hundred nineteen".