146755561 has 2 divisors, whose sum is σ = 146755562. Its totient is φ = 146755560.

The previous prime is 146755559. The next prime is 146755621. The reversal of 146755561 is 165557641.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 140659600 + 6095961 = 11860^2 + 2469^2 .

It is a cyclic number.

It is not a de Polignac number, because 146755561 - 2¹ = 146755559 is a prime.

Together with 146755559, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (146755261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 73377780 + 73377781.

It is an arithmetic number, because the mean of its divisors is an integer number (73377781).

Almost surely, 2^146755561 is an apocalyptic number.

It is an amenable number.

146755561 is a deficient number, since it is larger than the sum of its proper divisors (1).

146755561 is an equidigital number, since it uses as much as digits as its factorization.

146755561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 126000, while the sum is 40.

The square root of 146755561 is about 12114.2709644452. The cubic root of 146755561 is about 527.4705160853.

The spelling of 146755561 in words is "one hundred forty-six million, seven hundred fifty-five thousand, five hundred sixty-one".