145997601 has 4 divisors (see below), whose sum is σ = 194663472. Its totient is φ = 97331732.

The previous prime is 145997573. The next prime is 145997611. The reversal of 145997601 is 106799541.

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 not a de Polignac number, because 145997601 - 2⁷ = 145997473 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (145997611) 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, 24332931 + ... + 24332936.

It is an arithmetic number, because the mean of its divisors is an integer number (48665868).

Almost surely, 2^145997601 is an apocalyptic number.

It is an amenable number.

145997601 is a deficient number, since it is larger than the sum of its proper divisors (48665871).

145997601 is an equidigital number, since it uses as much as digits as its factorization.

145997601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48665870.

The product of its (nonzero) digits is 68040, while the sum is 42.

The square root of 145997601 is about 12082.9467018604. The cubic root of 145997601 is about 526.5608587228.

The spelling of 145997601 in words is "one hundred forty-five million, nine hundred ninety-seven thousand, six hundred one".