1275326620 has 48 divisors (see below), whose sum is σ = 2774298240. Its totient is φ = 491871744.

The previous prime is 1275326617. The next prime is 1275326629. The reversal of 1275326620 is 266235721.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1275326629) 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 15 ways as a sum of consecutive naturals, for example, 768832 + ... + 770488.

It is an arithmetic number, because the mean of its divisors is an integer number (57797880).

Almost surely, 2^1275326620 is an apocalyptic number.

1275326620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1275326620 is an abundant number, since it is smaller than the sum of its proper divisors (1498971620).

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

1275326620 is a wasteful number, since it uses less digits than its factorization.

1275326620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3022 (or 3020 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 1275326620 is about 35711.7154446549. The cubic root of 1275326620 is about 1084.4440284106. Note that the first 3 decimals are identical.

The spelling of 1275326620 in words is "one billion, two hundred seventy-five million, three hundred twenty-six thousand, six hundred twenty".