145321400 has 48 divisors (see below), whose sum is σ = 386143440. Its totient is φ = 49824000.

The previous prime is 145321387. The next prime is 145321403. The reversal of 145321400 is 4123541.

145321400 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×145321400² = 42236618595920000, which contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145321403) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 50501 + ... + 53300.

It is an arithmetic number, because the mean of its divisors is an integer number (8044655).

Almost surely, 2^145321400 is an apocalyptic number.

145321400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

145321400 is an abundant number, since it is smaller than the sum of its proper divisors (240822040).

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

145321400 is a wasteful number, since it uses less digits than its factorization.

145321400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103824 (or 103815 counting only the distinct ones).

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

The square root of 145321400 is about 12054.9326003923. The cubic root of 145321400 is about 525.7466624504.

Adding to 145321400 its reverse (4123541), we get a palindrome (149444941).

The spelling of 145321400 in words is "one hundred forty-five million, three hundred twenty-one thousand, four hundred".