145169540 has 12 divisors (see below), whose sum is σ = 304856076. Its totient is φ = 58067808.

The previous prime is 145169533. The next prime is 145169543. The reversal of 145169540 is 45961541.

It can be written as a sum of positive squares in 2 ways, for example, as 114875524 + 30294016 = 10718^2 + 5504^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 145169540.

It is not an unprimeable number, because it can be changed into a prime (145169543) 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, 3629219 + ... + 3629258.

It is an arithmetic number, because the mean of its divisors is an integer number (25404673).

Almost surely, 2^145169540 is an apocalyptic number.

145169540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

145169540 is an abundant number, since it is smaller than the sum of its proper divisors (159686536).

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

145169540 is a wasteful number, since it uses less digits than its factorization.

145169540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7258486 (or 7258484 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 35.

The square root of 145169540 is about 12048.6322875254. The cubic root of 145169540 is about 525.5634645753.

The spelling of 145169540 in words is "one hundred forty-five million, one hundred sixty-nine thousand, five hundred forty".