145520000 has 160 divisors (see below), whose sum is σ = 387157320. Its totient is φ = 54272000.

The previous prime is 145519991. The next prime is 145520009. The reversal of 145520000 is 25541.

It is an interprime number because it is at equal distance from previous prime (145519991) and next prime (145520009).

It is a tau number, because it is divible by the number of its divisors (160).

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145520009) 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 19 ways as a sum of consecutive naturals, for example, 1359947 + ... + 1360053.

Almost surely, 2^145520000 is an apocalyptic number.

145520000 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 145520000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (193578660).

145520000 is an abundant number, since it is smaller than the sum of its proper divisors (241637320).

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

145520000 is an equidigital number, since it uses as much as digits as its factorization.

145520000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158 (or 131 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 17.

The square root of 145520000 is about 12063.1670800002. The cubic root of 145520000 is about 525.9860531127.

Adding to 145520000 its reverse (25541), we get a palindrome (145545541).

The spelling of 145520000 in words is "one hundred forty-five million, five hundred twenty thousand".