146916721 has 16 divisors (see below), whose sum is σ = 178508160. Its totient is φ = 118108800.

The previous prime is 146916701. The next prime is 146916727. The reversal of 146916721 is 127619641.

It is a cyclic number.

It is not a de Polignac number, because 146916721 - 2⁷ = 146916593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (146916727) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7965 + ... + 18901.

It is an arithmetic number, because the mean of its divisors is an integer number (11156760).

Almost surely, 2^146916721 is an apocalyptic number.

It is an amenable number.

146916721 is a deficient number, since it is larger than the sum of its proper divisors (31591439).

146916721 is a wasteful number, since it uses less digits than its factorization.

146916721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11064.

The product of its digits is 18144, while the sum is 37.

The square root of 146916721 is about 12120.9207983552. The cubic root of 146916721 is about 527.6635264894.

It can be divided in two parts, 14691 and 6721, that added together give a palindrome (21412).

The spelling of 146916721 in words is "one hundred forty-six million, nine hundred sixteen thousand, seven hundred twenty-one".