145815001 has 4 divisors (see below), whose sum is σ = 154392372. Its totient is φ = 137237632.

The previous prime is 145814989. The next prime is 145815023. The reversal of 145815001 is 100518541.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 63441225 + 82373776 = 7965^2 + 9076^2 .

It is a cyclic number.

It is not a de Polignac number, because 145815001 - 2¹⁵ = 145782233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145815301) 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, 4288660 + ... + 4288693.

It is an arithmetic number, because the mean of its divisors is an integer number (38598093).

Almost surely, 2^145815001 is an apocalyptic number.

It is an amenable number.

145815001 is a deficient number, since it is larger than the sum of its proper divisors (8577371).

145815001 is an equidigital number, since it uses as much as digits as its factorization.

145815001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8577370.

The product of its (nonzero) digits is 800, while the sum is 25.

The square root of 145815001 is about 12075.3882339244. The cubic root of 145815001 is about 526.3412429548.

The spelling of 145815001 in words is "one hundred forty-five million, eight hundred fifteen thousand, one".