146721133 has 16 divisors (see below), whose sum is σ = 160578880. Its totient is φ = 133249536.

The previous prime is 146721103. The next prime is 146721137. The reversal of 146721133 is 331127641.

It is a cyclic number.

It is not a de Polignac number, because 146721133 - 2²⁵ = 113166701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (146721137) 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, 386938 + ... + 387316.

It is an arithmetic number, because the mean of its divisors is an integer number (10036180).

Almost surely, 2^146721133 is an apocalyptic number.

146721133 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

146721133 is a deficient number, since it is larger than the sum of its proper divisors (13857747).

146721133 is a wasteful number, since it uses less digits than its factorization.

146721133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 796.

The product of its digits is 3024, while the sum is 28.

The square root of 146721133 is about 12112.8499123864. The cubic root of 146721133 is about 527.4292656889.

Adding to 146721133 its reverse (331127641), we get a palindrome (477848774).

The spelling of 146721133 in words is "one hundred forty-six million, seven hundred twenty-one thousand, one hundred thirty-three".