1345620125 has 36 divisors (see below), whose sum is σ = 1793220156. Its totient is φ = 1007923200.

The previous prime is 1345620019. The next prime is 1345620163. The reversal of 1345620125 is 5210265431.

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 18 ways, for example, as 1290102724 + 55517401 = 35918^2 + 7451^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1345620125 is a prime.

It is a super-4 number, since 4×1345620125⁴ (a number of 38 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 6972029 + ... + 6972221.

It is an arithmetic number, because the mean of its divisors is an integer number (49811671).

Almost surely, 2^1345620125 is an apocalyptic number.

It is an amenable number.

1345620125 is a deficient number, since it is larger than the sum of its proper divisors (447600031).

1345620125 is an frugal number, since it uses more digits than its factorization.

1345620125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 435 (or 215 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 1345620125 is about 36682.6951708840. The cubic root of 1345620125 is about 1104.0129252342.

Adding to 1345620125 its reverse (5210265431), we get a palindrome (6555885556).

The spelling of 1345620125 in words is "one billion, three hundred forty-five million, six hundred twenty thousand, one hundred twenty-five".