145720025 has 36 divisors (see below), whose sum is σ = 208744080. Its totient is φ = 99799200.

The previous prime is 145720013. The next prime is 145720049. The reversal of 145720025 is 520027541.

145720025 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 145720025 - 2⁴ = 145720009 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 145719976 and 145720003.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 872492 + ... + 872658.

Almost surely, 2^145720025 is an apocalyptic number.

It is an amenable number.

145720025 is a deficient number, since it is larger than the sum of its proper divisors (63024055).

145720025 is a wasteful number, since it uses less digits than its factorization.

145720025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374 (or 202 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 26.

The square root of 145720025 is about 12071.4549661588. The cubic root of 145720025 is about 526.2269414014.

Adding to 145720025 its reverse (520027541), we get a palindrome (665747566).

The spelling of 145720025 in words is "one hundred forty-five million, seven hundred twenty thousand, twenty-five".