145421200 has 60 divisors (see below), whose sum is σ = 351233968. Its totient is φ = 57859200.

The previous prime is 145421197. The next prime is 145421233. The reversal of 145421200 is 2124541.

It is a super-2 number, since 2×145421200² = 42294650818880000, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 83539 + ... + 85261.

Almost surely, 2^145421200 is an apocalyptic number.

145421200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 145421200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (175616984).

145421200 is an abundant number, since it is smaller than the sum of its proper divisors (205812768).

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

145421200 is a wasteful number, since it uses less digits than its factorization.

145421200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1952 (or 1941 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 145421200 is about 12059.0712743561. The cubic root of 145421200 is about 525.8669877208.

Adding to 145421200 its reverse (2124541), we get a palindrome (147545741).

The spelling of 145421200 in words is "one hundred forty-five million, four hundred twenty-one thousand, two hundred".