145971349 has 4 divisors (see below), whose sum is σ = 146115340. Its totient is φ = 145827360.

The previous prime is 145971307. The next prime is 145971373. The reversal of 145971349 is 943179541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 943179541 = 157 ⋅6007513.

It can be written as a sum of positive squares in 2 ways, for example, as 35343025 + 110628324 = 5945^2 + 10518^2 .

It is a cyclic number.

It is not a de Polignac number, because 145971349 - 2¹⁵ = 145938581 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145971389) 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, 70464 + ... + 72505.

It is an arithmetic number, because the mean of its divisors is an integer number (36528835).

Almost surely, 2^145971349 is an apocalyptic number.

It is an amenable number.

145971349 is a deficient number, since it is larger than the sum of its proper divisors (143991).

145971349 is a wasteful number, since it uses less digits than its factorization.

145971349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143990.

The product of its digits is 136080, while the sum is 43.

The square root of 145971349 is about 12081.8603286083. The cubic root of 145971349 is about 526.5292963222.

The spelling of 145971349 in words is "one hundred forty-five million, nine hundred seventy-one thousand, three hundred forty-nine".