145969291 has 8 divisors (see below), whose sum is σ = 157444784. Its totient is φ = 134529120.

The previous prime is 145969289. The next prime is 145969319. The reversal of 145969291 is 192969541.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 145969291 - 2¹ = 145969289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145969211) 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, 100 + ... + 17086.

It is an arithmetic number, because the mean of its divisors is an integer number (19680598).

Almost surely, 2^145969291 is an apocalyptic number.

145969291 is a deficient number, since it is larger than the sum of its proper divisors (11475493).

145969291 is a wasteful number, since it uses less digits than its factorization.

145969291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17661.

The product of its digits is 174960, while the sum is 46.

The square root of 145969291 is about 12081.7751593050. The cubic root of 145969291 is about 526.5268218586.

The spelling of 145969291 in words is "one hundred forty-five million, nine hundred sixty-nine thousand, two hundred ninety-one".