145208901 has 4 divisors (see below), whose sum is σ = 193611872. Its totient is φ = 96805932.

The previous prime is 145208881. The next prime is 145208909. The reversal of 145208901 is 109802541.

It is a happy number.

145208901 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 not a de Polignac number, because 145208901 - 2⁶ = 145208837 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 (145208909) 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, 24201481 + ... + 24201486.

It is an arithmetic number, because the mean of its divisors is an integer number (48402968).

Almost surely, 2^145208901 is an apocalyptic number.

It is an amenable number.

145208901 is a deficient number, since it is larger than the sum of its proper divisors (48402971).

145208901 is an equidigital number, since it uses as much as digits as its factorization.

145208901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48402970.

The product of its (nonzero) digits is 2880, while the sum is 30.

The square root of 145208901 is about 12050.2655987327. The cubic root of 145208901 is about 525.6109603841.

The spelling of 145208901 in words is "one hundred forty-five million, two hundred eight thousand, nine hundred one".