145105025 has 12 divisors (see below), whose sum is σ = 193771452. Its totient is φ = 107154240.

The previous prime is 145105021. The next prime is 145105039. The reversal of 145105025 is 520501541.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 10010896 + 135094129 = 3164^2 + 11623^2 .

It is not a de Polignac number, because 145105025 - 2² = 145105021 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (145105021) 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, 222914 + ... + 223563.

It is an arithmetic number, because the mean of its divisors is an integer number (16147621).

Almost surely, 2^145105025 is an apocalyptic number.

It is an amenable number.

145105025 is a deficient number, since it is larger than the sum of its proper divisors (48666427).

145105025 is a wasteful number, since it uses less digits than its factorization.

145105025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 446500 (or 446495 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 23.

The square root of 145105025 is about 12045.9547151731. The cubic root of 145105025 is about 525.4855975723.

Adding to 145105025 its reverse (520501541), we get a palindrome (665606566).

The spelling of 145105025 in words is "one hundred forty-five million, one hundred five thousand, twenty-five".