146603921 has 2 divisors, whose sum is σ = 146603922. Its totient is φ = 146603920.

The previous prime is 146603887. The next prime is 146603927. The reversal of 146603921 is 129306641.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 127803025 + 18800896 = 11305^2 + 4336^2 .

It is a cyclic number.

It is not a de Polignac number, because 146603921 - 2¹⁴ = 146587537 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (146603927) 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 as a sum of consecutive naturals, namely, 73301960 + 73301961.

It is an arithmetic number, because the mean of its divisors is an integer number (73301961).

Almost surely, 2^146603921 is an apocalyptic number.

It is an amenable number.

146603921 is a deficient number, since it is larger than the sum of its proper divisors (1).

146603921 is an equidigital number, since it uses as much as digits as its factorization.

146603921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 146603921 is about 12108.0106128133. The cubic root of 146603921 is about 527.2887780678.

It can be divided in two parts, 14660 and 3921, that added together give a palindrome (18581).

The spelling of 146603921 in words is "one hundred forty-six million, six hundred three thousand, nine hundred twenty-one".