1225140145 has 8 divisors (see below), whose sum is σ = 1490875200. Its totient is φ = 966307440.

The previous prime is 1225140143. The next prime is 1225140157. The reversal of 1225140145 is 5410415221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1225140145 - 2¹ = 1225140143 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1225140143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1725195 + ... + 1725904.

It is an arithmetic number, because the mean of its divisors is an integer number (186359400).

Almost surely, 2^1225140145 is an apocalyptic number.

It is an amenable number.

1225140145 is a deficient number, since it is larger than the sum of its proper divisors (265735055).

1225140145 is an equidigital number, since it uses as much as digits as its factorization.

1225140145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3451175.

The product of its (nonzero) digits is 1600, while the sum is 25.

The square root of 1225140145 is about 35002.0020141706. The cubic root of 1225140145 is about 1070.0282826542.

Adding to 1225140145 its reverse (5410415221), we get a palindrome (6635555366).

The spelling of 1225140145 in words is "one billion, two hundred twenty-five million, one hundred forty thousand, one hundred forty-five".