145405349 has 4 divisors (see below), whose sum is σ = 146692236. Its totient is φ = 144118464.

The previous prime is 145405327. The next prime is 145405363. The reversal of 145405349 is 943504541.

145405349 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 60949249 + 84456100 = 7807^2 + 9190^2 .

It is a cyclic number.

It is not a de Polignac number, because 145405349 - 2⁸ = 145405093 is a prime.

It is a super-2 number, since 2×145405349² = 42285431035623602, 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 (145405319) 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, 643274 + ... + 643499.

It is an arithmetic number, because the mean of its divisors is an integer number (36673059).

Almost surely, 2^145405349 is an apocalyptic number.

It is an amenable number.

145405349 is a deficient number, since it is larger than the sum of its proper divisors (1286887).

145405349 is a wasteful number, since it uses less digits than its factorization.

145405349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1286886.

The product of its (nonzero) digits is 43200, while the sum is 35.

The square root of 145405349 is about 12058.4140333628. The cubic root of 145405349 is about 525.8478804185.

The spelling of 145405349 in words is "one hundred forty-five million, four hundred five thousand, three hundred forty-nine".