145105919 has 8 divisors (see below), whose sum is σ = 173045760. Its totient is φ = 118968696.

The previous prime is 145105913. The next prime is 145105963. The reversal of 145105919 is 919501541.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 145105919 - 2⁴ = 145105903 is a prime.

It is a super-2 number, since 2×145105919² = 42111455457669122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145105913) 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, 450479 + ... + 450800.

It is an arithmetic number, because the mean of its divisors is an integer number (21630720).

Almost surely, 2^145105919 is an apocalyptic number.

145105919 is a deficient number, since it is larger than the sum of its proper divisors (27939841).

145105919 is an equidigital number, since it uses as much as digits as its factorization.

145105919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 901309.

The product of its (nonzero) digits is 8100, while the sum is 35.

The square root of 145105919 is about 12045.9918230090. The cubic root of 145105919 is about 525.4866767519.

The spelling of 145105919 in words is "one hundred forty-five million, one hundred five thousand, nine hundred nineteen".