145525540 has 12 divisors (see below), whose sum is σ = 305603676. Its totient is φ = 58210208.

The previous prime is 145525529. The next prime is 145525543. The reversal of 145525540 is 45525541.

It can be written as a sum of positive squares in 2 ways, for example, as 21381376 + 124144164 = 4624^2 + 11142^2 .

It is not an unprimeable number, because it can be changed into a prime (145525543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3638119 + ... + 3638158.

It is an arithmetic number, because the mean of its divisors is an integer number (25466973).

Almost surely, 2^145525540 is an apocalyptic number.

145525540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

145525540 is an abundant number, since it is smaller than the sum of its proper divisors (160078136).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

145525540 is a wasteful number, since it uses less digits than its factorization.

145525540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7276286 (or 7276284 counting only the distinct ones).

The product of its (nonzero) digits is 20000, while the sum is 31.

The square root of 145525540 is about 12063.3967024218. The cubic root of 145525540 is about 525.9927278556.

Subtracting from 145525540 its reverse (45525541), we obtain a palindrome (99999999).

The spelling of 145525540 in words is "one hundred forty-five million, five hundred twenty-five thousand, five hundred forty".