145535261 has 2 divisors, whose sum is σ = 145535262. Its totient is φ = 145535260.

The previous prime is 145535251. The next prime is 145535293. The reversal of 145535261 is 162535541.

It is an a-pointer prime, because the next prime (145535293) can be obtained adding 145535261 to its sum of digits (32).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 81631225 + 63904036 = 9035^2 + 7994^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145535261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145535251) 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 as a sum of consecutive naturals, namely, 72767630 + 72767631.

It is an arithmetic number, because the mean of its divisors is an integer number (72767631).

Almost surely, 2^145535261 is an apocalyptic number.

It is an amenable number.

145535261 is a deficient number, since it is larger than the sum of its proper divisors (1).

145535261 is an equidigital number, since it uses as much as digits as its factorization.

145535261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18000, while the sum is 32.

The square root of 145535261 is about 12063.7996087468. The cubic root of 145535261 is about 526.0044395718.

The spelling of 145535261 in words is "one hundred forty-five million, five hundred thirty-five thousand, two hundred sixty-one".