146919721 has 8 divisors (see below), whose sum is σ = 158412800. Its totient is φ = 135454032.

The previous prime is 146919701. The next prime is 146919737. The reversal of 146919721 is 127919641.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 146919721 - 2¹⁹ = 146395433 is a prime.

It is not an unprimeable number, because it can be changed into a prime (146919701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5080 + ... + 17878.

It is an arithmetic number, because the mean of its divisors is an integer number (19801600).

Almost surely, 2^146919721 is an apocalyptic number.

It is an amenable number.

146919721 is a deficient number, since it is larger than the sum of its proper divisors (11493079).

146919721 is a wasteful number, since it uses less digits than its factorization.

146919721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13695.

The product of its digits is 27216, while the sum is 40.

The square root of 146919721 is about 12121.0445506978. The cubic root of 146919721 is about 527.6671180475.

The spelling of 146919721 in words is "one hundred forty-six million, nine hundred nineteen thousand, seven hundred twenty-one".