1250387978 has 80 divisors (see below), whose sum is σ = 2368637640. Its totient is φ = 494841984.

The previous prime is 1250387977. The next prime is 1250387981. The reversal of 1250387978 is 8797830521.

It can be written as a sum of positive squares in 4 ways, for example, as 1186595809 + 63792169 = 34447^2 + 7987^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1250387977) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 23592200 + ... + 23592252.

Almost surely, 2^1250387978 is an apocalyptic number.

1250387978 is a deficient number, since it is larger than the sum of its proper divisors (1118249662).

1250387978 is an frugal number, since it uses more digits than its factorization.

1250387978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134 (or 79 counting only the distinct ones).

The product of its (nonzero) digits is 846720, while the sum is 50.

The square root of 1250387978 is about 35360.8254711340. The cubic root of 1250387978 is about 1077.3287832555.

The spelling of 1250387978 in words is "one billion, two hundred fifty million, three hundred eighty-seven thousand, nine hundred seventy-eight".