1296620325 has 384 divisors, whose sum is σ = 3399782400. Its totient is φ = 466560000.

The previous prime is 1296620321. The next prime is 1296620327. The reversal of 1296620325 is 5230266921.

1296620325 is a `hidden beast` number, since 1 + 2 + 9 + 6 + 620 + 3 + 25 = 666.

It is not a de Polignac number, because 1296620325 - 2² = 1296620321 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1296620325.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1296620321) by changing a digit.

It is a polite number, since it can be written in 383 ways as a sum of consecutive naturals, for example, 12837775 + ... + 12837875.

It is an arithmetic number, because the mean of its divisors is an integer number (8853600).

Almost surely, 2^1296620325 is an apocalyptic number.

1296620325 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1296620325 is an abundant number, since it is smaller than the sum of its proper divisors (2103162075).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1296620325 is a wasteful number, since it uses less digits than its factorization.

1296620325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170 (or 159 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The square root of 1296620325 is about 36008.6145942884. The cubic root of 1296620325 is about 1090.4462793930.

The spelling of 1296620325 in words is "one billion, two hundred ninety-six million, six hundred twenty thousand, three hundred twenty-five".