145120545 has 32 divisors (see below), whose sum is σ = 258599040. Its totient is φ = 77215680.

The previous prime is 145120541. The next prime is 145120559. The reversal of 145120545 is 545021541.

145120545 is a `hidden beast` number, since 1 + 451 + 205 + 4 + 5 = 666.

It is not a de Polignac number, because 145120545 - 2² = 145120541 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (145120541) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 72042 + ... + 74028.

It is an arithmetic number, because the mean of its divisors is an integer number (8081220).

Almost surely, 2^145120545 is an apocalyptic number.

145120545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

145120545 is a deficient number, since it is larger than the sum of its proper divisors (113478495).

145120545 is a wasteful number, since it uses less digits than its factorization.

145120545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2542 (or 2536 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 27.

The square root of 145120545 is about 12046.5988976142. The cubic root of 145120545 is about 525.5043316943.

The spelling of 145120545 in words is "one hundred forty-five million, one hundred twenty thousand, five hundred forty-five".