145225401 has 4 divisors (see below), whose sum is σ = 193633872. Its totient is φ = 96816932.

The previous prime is 145225391. The next prime is 145225433. The reversal of 145225401 is 104522541.

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: 104522541 = 3 ⋅34840847.

It is a cyclic number.

It is not a de Polignac number, because 145225401 - 2⁷ = 145225273 is a prime.

It is a super-2 number, since 2×145225401² = 42180834191221602, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (145226401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24204231 + ... + 24204236.

It is an arithmetic number, because the mean of its divisors is an integer number (48408468).

Almost surely, 2^145225401 is an apocalyptic number.

It is an amenable number.

145225401 is a deficient number, since it is larger than the sum of its proper divisors (48408471).

145225401 is an equidigital number, since it uses as much as digits as its factorization.

145225401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48408470.

The product of its (nonzero) digits is 1600, while the sum is 24.

The square root of 145225401 is about 12050.9502114978. The cubic root of 145225401 is about 525.6308679158.

Adding to 145225401 its reverse (104522541), we get a palindrome (249747942).

It can be divided in two parts, 14522540 and 1, that added together give a palindrome (14522541).

The spelling of 145225401 in words is "one hundred forty-five million, two hundred twenty-five thousand, four hundred one".