146774521 has 4 divisors (see below), whose sum is σ = 146823844. Its totient is φ = 146725200.

The previous prime is 146774519. The next prime is 146774527. The reversal of 146774521 is 125477641.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 125477641 = 191 ⋅656951.

It can be written as a sum of positive squares in 2 ways, for example, as 10725625 + 136048896 = 3275^2 + 11664^2 .

It is a cyclic number.

It is not a de Polignac number, because 146774521 - 2¹ = 146774519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (146774527) 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, 19890 + ... + 26251.

It is an arithmetic number, because the mean of its divisors is an integer number (36705961).

Almost surely, 2^146774521 is an apocalyptic number.

It is an amenable number.

146774521 is a deficient number, since it is larger than the sum of its proper divisors (49323).

146774521 is an equidigital number, since it uses as much as digits as its factorization.

146774521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49322.

The product of its digits is 47040, while the sum is 37.

The square root of 146774521 is about 12115.0534872942. The cubic root of 146774521 is about 527.4932305234.

The spelling of 146774521 in words is "one hundred forty-six million, seven hundred seventy-four thousand, five hundred twenty-one".