145485997 has 4 divisors (see below), whose sum is σ = 145866240. Its totient is φ = 145105756.

The previous prime is 145485959. The next prime is 145486001. The reversal of 145485997 is 799584541.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145485997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145485937) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 189547 + ... + 190312.

It is an arithmetic number, because the mean of its divisors is an integer number (36466560).

Almost surely, 2^145485997 is an apocalyptic number.

It is an amenable number.

145485997 is a deficient number, since it is larger than the sum of its proper divisors (380243).

145485997 is an equidigital number, since it uses as much as digits as its factorization.

145485997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380242.

The product of its digits is 1814400, while the sum is 52.

The square root of 145485997 is about 12061.7576248240. The cubic root of 145485997 is about 525.9450816610.

The spelling of 145485997 in words is "one hundred forty-five million, four hundred eighty-five thousand, nine hundred ninety-seven".