145807801 has 4 divisors (see below), whose sum is σ = 147861504. Its totient is φ = 143754100.

The previous prime is 145807789. The next prime is 145807819. The reversal of 145807801 is 108708541.

145807801 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, and also an emirpimes, since its reverse is a distinct semiprime: 108708541 = 137 ⋅793493.

It is a cyclic number.

It is not a de Polignac number, because 145807801 - 2⁵ = 145807769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145807841) 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, 1026745 + ... + 1026886.

It is an arithmetic number, because the mean of its divisors is an integer number (36965376).

Almost surely, 2^145807801 is an apocalyptic number.

It is an amenable number.

145807801 is a deficient number, since it is larger than the sum of its proper divisors (2053703).

145807801 is an equidigital number, since it uses as much as digits as its factorization.

145807801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2053702.

The product of its (nonzero) digits is 8960, while the sum is 34.

The square root of 145807801 is about 12075.0901031835. The cubic root of 145807801 is about 526.3325796502.

The spelling of 145807801 in words is "one hundred forty-five million, eight hundred seven thousand, eight hundred one".