145521570 has 64 divisors (see below), whose sum is σ = 374647680. Its totient is φ = 36062208.

The previous prime is 145521557. The next prime is 145521577. The reversal of 145521570 is 75125541.

145521570 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (145521577) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27802 + ... + 32618.

It is an arithmetic number, because the mean of its divisors is an integer number (5853870).

Almost surely, 2^145521570 is an apocalyptic number.

145521570 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 145521570, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (187323840).

145521570 is an abundant number, since it is smaller than the sum of its proper divisors (229126110).

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

145521570 is a wasteful number, since it uses less digits than its factorization.

145521570 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4899.

The product of its (nonzero) digits is 7000, while the sum is 30.

The square root of 145521570 is about 12063.2321539461. The cubic root of 145521570 is about 525.9879447087.

The spelling of 145521570 in words is "one hundred forty-five million, five hundred twenty-one thousand, five hundred seventy".