1405321620125 has 12 divisors (see below), whose sum is σ = 1753857922908. Its totient is φ = 1124246693000.

The previous prime is 1405321620121. The next prime is 1405321620173. The reversal of 1405321620125 is 5210261235041.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 44970291844 + 1360351328281 = 212062^2 + 1166341^2 .

It is not a de Polignac number, because 1405321620125 - 2² = 1405321620121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1405321620091 and 1405321620100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1405321620121) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13200860 + ... + 13306890.

It is an arithmetic number, because the mean of its divisors is an integer number (146154826909).

Almost surely, 2^{1405321620125} is an apocalyptic number.

It is an amenable number.

1405321620125 is a deficient number, since it is larger than the sum of its proper divisors (348536302783).

1405321620125 is an frugal number, since it uses more digits than its factorization.

1405321620125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212077 (or 106036 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 32.

Adding to 1405321620125 its reverse (5210261235041), we get a palindrome (6615582855166).

The spelling of 1405321620125 in words is "one trillion, four hundred five billion, three hundred twenty-one million, six hundred twenty thousand, one hundred twenty-five".