145129825 has 6 divisors (see below), whose sum is σ = 179961014. Its totient is φ = 116103840.

The previous prime is 145129823. The next prime is 145129837. The reversal of 145129825 is 528921541.

It can be written as a sum of positive squares in 3 ways, for example, as 10732176 + 134397649 = 3276^2 + 11593^2 .

It is not a de Polignac number, because 145129825 - 2¹ = 145129823 is a prime.

It is a super-2 number, since 2×145129825² = 42125332209061250, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145129823) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2902572 + ... + 2902621.

Almost surely, 2^145129825 is an apocalyptic number.

It is an amenable number.

145129825 is a deficient number, since it is larger than the sum of its proper divisors (34831189).

145129825 is an equidigital number, since it uses as much as digits as its factorization.

145129825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5805203 (or 5805198 counting only the distinct ones).

The product of its digits is 28800, while the sum is 37.

The square root of 145129825 is about 12046.9840624116. The cubic root of 145129825 is about 525.5155329024.

The spelling of 145129825 in words is "one hundred forty-five million, one hundred twenty-nine thousand, eight hundred twenty-five".