146503561 has 2 divisors, whose sum is σ = 146503562. Its totient is φ = 146503560.

The previous prime is 146503543. The next prime is 146503571. The reversal of 146503561 is 165305641.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 138415225 + 8088336 = 11765^2 + 2844^2 .

It is a cyclic number.

It is not a de Polignac number, because 146503561 - 2⁵ = 146503529 is a prime.

It is a super-3 number, since 3×146503561³ (a number of 25 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (146503541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 73251780 + 73251781.

It is an arithmetic number, because the mean of its divisors is an integer number (73251781).

Almost surely, 2^146503561 is an apocalyptic number.

It is an amenable number.

146503561 is a deficient number, since it is larger than the sum of its proper divisors (1).

146503561 is an equidigital number, since it uses as much as digits as its factorization.

146503561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 146503561 is about 12103.8655395704. The cubic root of 146503561 is about 527.1684293498.

The spelling of 146503561 in words is "one hundred forty-six million, five hundred three thousand, five hundred sixty-one".