145748449 has 16 divisors (see below), whose sum is σ = 191278080. Its totient is φ = 107591760.

The previous prime is 145748441. The next prime is 145748479. The reversal of 145748449 is 944847541.

It is a cyclic number.

It is not a de Polignac number, because 145748449 - 2³ = 145748441 is a prime.

It is a super-2 number, since 2×145748449² = 42485220771811202, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 145748399 and 145748408.

It is not an unprimeable number, because it can be changed into a prime (145748441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48349 + ... + 51274.

It is an arithmetic number, because the mean of its divisors is an integer number (11954880).

Almost surely, 2^145748449 is an apocalyptic number.

145748449 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

145748449 is a deficient number, since it is larger than the sum of its proper divisors (45529631).

145748449 is a wasteful number, since it uses less digits than its factorization.

145748449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99660.

The product of its digits is 645120, while the sum is 46.

The square root of 145748449 is about 12072.6322316221. The cubic root of 145748449 is about 526.2611542745.

The spelling of 145748449 in words is "one hundred forty-five million, seven hundred forty-eight thousand, four hundred forty-nine".