145902241 has 9 divisors (see below), whose sum is σ = 149654899. Its totient is φ = 142242304.

The previous prime is 145902233. The next prime is 145902247. The reversal of 145902241 is 142209541.

The square root of 145902241 is 12079.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 143640225 + 2262016 = 11985^2 + 1504^2 .

It is not a de Polignac number, because 145902241 - 2³ = 145902233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145902247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 567585 + ... + 567841.

Almost surely, 2^145902241 is an apocalyptic number.

145902241 is the 12079-th square number.

145902241 is the 6040-th centered octagonal number.

It is an amenable number.

145902241 is a deficient number, since it is larger than the sum of its proper divisors (3752658).

145902241 is an frugal number, since it uses more digits than its factorization.

145902241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 608 (or 304 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 28.

The cubic root of 145902241 is about 526.4461906746.

The spelling of 145902241 in words is "one hundred forty-five million, nine hundred two thousand, two hundred forty-one".