1325986978 has 16 divisors (see below), whose sum is σ = 2122062624. Its totient is φ = 619228480.

The previous prime is 1325986957. The next prime is 1325986979. The reversal of 1325986978 is 8796895231.

It is not an unprimeable number, because it can be changed into a prime (1325986979) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 144400 + ... + 153307.

It is an arithmetic number, because the mean of its divisors is an integer number (132628914).

Almost surely, 2^1325986978 is an apocalyptic number.

1325986978 is a deficient number, since it is larger than the sum of its proper divisors (796075646).

1325986978 is a wasteful number, since it uses less digits than its factorization.

1325986978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297857.

The product of its digits is 6531840, while the sum is 58.

The square root of 1325986978 is about 36414.1041081612. The cubic root of 1325986978 is about 1098.6172647897.

The spelling of 1325986978 in words is "one billion, three hundred twenty-five million, nine hundred eighty-six thousand, nine hundred seventy-eight".