145197449 has 12 divisors (see below), whose sum is σ = 154497024. Its totient is φ = 136429272.

The previous prime is 145197443. The next prime is 145197463. The reversal of 145197449 is 944791541.

It is not a de Polignac number, because 145197449 - 2⁴ = 145197433 is a prime.

It is a super-2 number, since 2×145197449² = 42164598392215202, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (145197443) 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, 44264 + ... + 47430.

It is an arithmetic number, because the mean of its divisors is an integer number (12874752).

Almost surely, 2^145197449 is an apocalyptic number.

145197449 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

145197449 is a deficient number, since it is larger than the sum of its proper divisors (9299575).

145197449 is a wasteful number, since it uses less digits than its factorization.

145197449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3332 (or 3313 counting only the distinct ones).

The product of its digits is 181440, while the sum is 44.

The square root of 145197449 is about 12049.7904131151. The cubic root of 145197449 is about 525.5971424640.

The spelling of 145197449 in words is "one hundred forty-five million, one hundred ninety-seven thousand, four hundred forty-nine".