1242678528 has 216 divisors, whose sum is σ = 4410526848. Its totient is φ = 327684096.

The previous prime is 1242678517. The next prime is 1242678539. The reversal of 1242678528 is 8258762421.

1242678528 is a `hidden beast` number, since 12 + 42 + 6 + 78 + 528 = 666.

It is an interprime number because it is at equal distance from previous prime (1242678517) and next prime (1242678539).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 206701 + ... + 212627.

Almost surely, 2^1242678528 is an apocalyptic number.

1242678528 is a gapful number since it is divisible by the number (18) 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 1242678528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2205263424).

1242678528 is an abundant number, since it is smaller than the sum of its proper divisors (3167848320).

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

1242678528 is a wasteful number, since it uses less digits than its factorization.

1242678528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5969 (or 5952 counting only the distinct ones).

The product of its digits is 430080, while the sum is 45.

The square root of 1242678528 is about 35251.6457488158. The cubic root of 1242678528 is about 1075.1100743244.

The spelling of 1242678528 in words is "one billion, two hundred forty-two million, six hundred seventy-eight thousand, five hundred twenty-eight".