1294427520 has 256 divisors, whose sum is σ = 4621579200. Its totient is φ = 342392832.

The previous prime is 1294427509. The next prime is 1294427527. The reversal of 1294427520 is 257244921.

1294427520 is a `hidden beast` number, since 1 + 2 + 94 + 42 + 7 + 520 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1294427527) 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 31 ways as a sum of consecutive naturals, for example, 2989224 + ... + 2989656.

Almost surely, 2^1294427520 is an apocalyptic number.

1294427520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1294427520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2310789600).

1294427520 is an abundant number, since it is smaller than the sum of its proper divisors (3327151680).

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

1294427520 is a wasteful number, since it uses less digits than its factorization.

1294427520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 634 (or 616 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 1294427520 is about 35978.1533711779. The cubic root of 1294427520 is about 1089.8312226401.

The spelling of 1294427520 in words is "one billion, two hundred ninety-four million, four hundred twenty-seven thousand, five hundred twenty".