145235861 has 2 divisors, whose sum is σ = 145235862. Its totient is φ = 145235860.

The previous prime is 145235821. The next prime is 145235863. The reversal of 145235861 is 168532541.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 110355025 + 34880836 = 10505^2 + 5906^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145235861 is a prime.

It is a super-2 number, since 2×145235861² = 42186910640822642, which contains 22 as substring.

Together with 145235863, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145235863) 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, 72617930 + 72617931.

It is an arithmetic number, because the mean of its divisors is an integer number (72617931).

Almost surely, 2^145235861 is an apocalyptic number.

It is an amenable number.

145235861 is a deficient number, since it is larger than the sum of its proper divisors (1).

145235861 is an equidigital number, since it uses as much as digits as its factorization.

145235861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28800, while the sum is 35.

The square root of 145235861 is about 12051.3841943571. The cubic root of 145235861 is about 525.6434873034.

The spelling of 145235861 in words is "one hundred forty-five million, two hundred thirty-five thousand, eight hundred sixty-one".