145683261 has 12 divisors (see below), whose sum is σ = 210936700. Its totient is φ = 96888960.

The previous prime is 145683257. The next prime is 145683281. The reversal of 145683261 is 162386541.

It is a happy number.

145683261 is a `hidden beast` number, since 1 + 4 + 568 + 32 + 61 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 962361 + 144720900 = 981^2 + 12030^2 .

It is not a de Polignac number, because 145683261 - 2² = 145683257 is a prime.

It is a super-2 number, since 2×145683261² = 42447225071188242, 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 (145683281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15436 + ... + 23013.

Almost surely, 2^145683261 is an apocalyptic number.

It is an amenable number.

145683261 is a deficient number, since it is larger than the sum of its proper divisors (65253439).

145683261 is a wasteful number, since it uses less digits than its factorization.

145683261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38876 (or 38873 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 145683261 is about 12069.9321042001. The cubic root of 145683261 is about 526.1826833926.

The spelling of 145683261 in words is "one hundred forty-five million, six hundred eighty-three thousand, two hundred sixty-one".