145215025 has 6 divisors (see below), whose sum is σ = 180066662. Its totient is φ = 116172000.

The previous prime is 145215019. The next prime is 145215089. The reversal of 145215025 is 520512541.

145215025 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 1382976 + 143832049 = 1176^2 + 11993^2 .

It is not a de Polignac number, because 145215025 - 2⁷ = 145214897 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25), and also a Moran number because the ratio is a prime number: 5808601 = 145215025 / (1 + 4 + 5 + 2 + 1 + 5 + 0 + 2 + 5).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2904276 + ... + 2904325.

Almost surely, 2^145215025 is an apocalyptic number.

It is an amenable number.

145215025 is a deficient number, since it is larger than the sum of its proper divisors (34851637).

145215025 is an equidigital number, since it uses as much as digits as its factorization.

145215025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5808611 (or 5808606 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 25.

The square root of 145215025 is about 12050.5196983367. The cubic root of 145215025 is about 525.6183492706.

Adding to 145215025 its reverse (520512541), we get a palindrome (665727566).

The spelling of 145215025 in words is "one hundred forty-five million, two hundred fifteen thousand, twenty-five".