145661133 has 16 divisors (see below), whose sum is σ = 196992000. Its totient is φ = 95728176.

The previous prime is 145661129. The next prime is 145661137. The reversal of 145661133 is 331166541.

It is an interprime number because it is at equal distance from previous prime (145661129) and next prime (145661137).

It is not a de Polignac number, because 145661133 - 2² = 145661129 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 145661133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145661137) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71868 + ... + 73866.

It is an arithmetic number, because the mean of its divisors is an integer number (12312000).

Almost surely, 2^145661133 is an apocalyptic number.

It is an amenable number.

145661133 is a deficient number, since it is larger than the sum of its proper divisors (51330867).

145661133 is a wasteful number, since it uses less digits than its factorization.

145661133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2336.

The product of its digits is 6480, while the sum is 30.

The square root of 145661133 is about 12069.0154113747. The cubic root of 145661133 is about 526.1560412103.

The spelling of 145661133 in words is "one hundred forty-five million, six hundred sixty-one thousand, one hundred thirty-three".