145021055 has 8 divisors (see below), whose sum is σ = 174107472. Its totient is φ = 115962048.

The previous prime is 145021039. The next prime is 145021073. The reversal of 145021055 is 550120541.

It is a happy number.

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 145021055 - 2⁴ = 145021039 is a prime.

It is a super-2 number, since 2×145021055² = 42062212786626050, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 145021055.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7544 + ... + 18626.

It is an arithmetic number, because the mean of its divisors is an integer number (21763434).

Almost surely, 2^145021055 is an apocalyptic number.

145021055 is a deficient number, since it is larger than the sum of its proper divisors (29086417).

145021055 is a wasteful number, since it uses less digits than its factorization.

145021055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13705.

The product of its (nonzero) digits is 1000, while the sum is 23.

The square root of 145021055 is about 12042.4688083466. The cubic root of 145021055 is about 525.3842145916.

Adding to 145021055 its reverse (550120541), we get a palindrome (695141596).

The spelling of 145021055 in words is "one hundred forty-five million, twenty-one thousand, fifty-five".