145320140 has 24 divisors (see below), whose sum is σ = 348768672. Its totient is φ = 49824000.

The previous prime is 145320137. The next prime is 145320143. The reversal of 145320140 is 41023541.

It is an interprime number because it is at equal distance from previous prime (145320137) and next prime (145320143).

It is a super-2 number, since 2×145320140² = 42235886179239200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (145320143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 518861 + ... + 519140.

It is an arithmetic number, because the mean of its divisors is an integer number (14532028).

Almost surely, 2^145320140 is an apocalyptic number.

145320140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

145320140 is an abundant number, since it is smaller than the sum of its proper divisors (203448532).

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

145320140 is a wasteful number, since it uses less digits than its factorization.

145320140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1038017 (or 1038015 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 145320140 is about 12054.8803395140. The cubic root of 145320140 is about 525.7451429616.

Adding to 145320140 its reverse (41023541), we get a palindrome (186343681).

The spelling of 145320140 in words is "one hundred forty-five million, three hundred twenty thousand, one hundred forty".