145436121 has 16 divisors (see below), whose sum is σ = 219115200. Its totient is φ = 95313024.

The previous prime is 145436119. The next prime is 145436149. The reversal of 145436121 is 121634541.

It is a happy number.

145436121 is a `hidden beast` number, since 1 + 4 + 5 + 43 + 612 + 1 = 666.

It is not a de Polignac number, because 145436121 - 2¹ = 145436119 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (145436101) 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, 44056 + ... + 47241.

It is an arithmetic number, because the mean of its divisors is an integer number (13694700).

Almost surely, 2^145436121 is an apocalyptic number.

It is an amenable number.

145436121 is a deficient number, since it is larger than the sum of its proper divisors (73679079).

145436121 is an equidigital number, since it uses as much as digits as its factorization.

145436121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91365 (or 91359 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 145436121 is about 12059.6899213869. The cubic root of 145436121 is about 525.8849727028.

The spelling of 145436121 in words is "one hundred forty-five million, four hundred thirty-six thousand, one hundred twenty-one".