146604721 has 4 divisors (see below), whose sum is σ = 146791792. Its totient is φ = 146417652.

The previous prime is 146604709. The next prime is 146604727. The reversal of 146604721 is 127406641.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 146604721 - 2⁷ = 146604593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (146604727) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 92355 + ... + 93928.

It is an arithmetic number, because the mean of its divisors is an integer number (36697948).

Almost surely, 2^146604721 is an apocalyptic number.

It is an amenable number.

146604721 is a deficient number, since it is larger than the sum of its proper divisors (187071).

146604721 is an equidigital number, since it uses as much as digits as its factorization.

146604721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187070.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 146604721 is about 12108.0436487485. The cubic root of 146604721 is about 527.2897371832.

The spelling of 146604721 in words is "one hundred forty-six million, six hundred four thousand, seven hundred twenty-one".