145621125 has 64 divisors (see below), whose sum is σ = 290035200. Its totient is φ = 71668800.

The previous prime is 145621123. The next prime is 145621139. The reversal of 145621125 is 521126541.

145621125 is a `hidden beast` number, since 14 + 5 + 621 + 1 + 25 = 666.

It is not a de Polignac number, because 145621125 - 2¹ = 145621123 is a prime.

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

It is a Curzon number.

It is a nialpdrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145621123) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 42216 + ... + 45534.

It is an arithmetic number, because the mean of its divisors is an integer number (4531800).

Almost surely, 2^145621125 is an apocalyptic number.

145621125 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

145621125 is a deficient number, since it is larger than the sum of its proper divisors (144414075).

145621125 is a wasteful number, since it uses less digits than its factorization.

145621125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3356 (or 3340 counting only the distinct ones).

The product of its digits is 2400, while the sum is 27.

The square root of 145621125 is about 12067.3578301134. The cubic root of 145621125 is about 526.1078646010.

Adding to 145621125 its reverse (521126541), we get a palindrome (666747666).

The spelling of 145621125 in words is "one hundred forty-five million, six hundred twenty-one thousand, one hundred twenty-five".