145442100 has 72 divisors (see below), whose sum is σ = 422278528. Its totient is φ = 38649600.

The previous prime is 145442069. The next prime is 145442147. The reversal of 145442100 is 1244541.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 109440 + ... + 110760.

Almost surely, 2^145442100 is an apocalyptic number.

145442100 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 145442100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (211139264).

145442100 is an abundant number, since it is smaller than the sum of its proper divisors (276836428).

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

145442100 is a wasteful number, since it uses less digits than its factorization.

145442100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1705 (or 1698 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 145442100 is about 12059.9378107849. The cubic root of 145442100 is about 525.8921791270.

Adding to 145442100 its reverse (1244541), we get a palindrome (146686641).

The spelling of 145442100 in words is "one hundred forty-five million, four hundred forty-two thousand, one hundred".