1321154125 has 32 divisors (see below), whose sum is σ = 1708462080. Its totient is φ = 1018944000.

The previous prime is 1321154119. The next prime is 1321154129. The reversal of 1321154125 is 5214511231.

It is not a de Polignac number, because 1321154125 - 2¹⁹ = 1320629837 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a self number, because there is not a number n which added to its sum of digits gives 1321154125.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321154129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1421661 + ... + 1422589.

It is an arithmetic number, because the mean of its divisors is an integer number (53389440).

Almost surely, 2^1321154125 is an apocalyptic number.

It is an amenable number.

1321154125 is a deficient number, since it is larger than the sum of its proper divisors (387307955).

1321154125 is an equidigital number, since it uses as much as digits as its factorization.

1321154125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1342 (or 1332 counting only the distinct ones).

The product of its digits is 1200, while the sum is 25.

The square root of 1321154125 is about 36347.6839014537. The cubic root of 1321154125 is about 1097.2809220200.

Adding to 1321154125 its reverse (5214511231), we get a palindrome (6535665356).

The spelling of 1321154125 in words is "one billion, three hundred twenty-one million, one hundred fifty-four thousand, one hundred twenty-five".