1187478126 has 48 divisors (see below), whose sum is σ = 2667749760. Its totient is φ = 381343680.

The previous prime is 1187478113. The next prime is 1187478137. The reversal of 1187478126 is 6218747811.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

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, 123136 + ... + 132428.

It is an arithmetic number, because the mean of its divisors is an integer number (55578120).

Almost surely, 2^1187478126 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1187478126, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1333874880).

1187478126 is an abundant number, since it is smaller than the sum of its proper divisors (1480271634).

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

1187478126 is a wasteful number, since it uses less digits than its factorization.

1187478126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9561 (or 9558 counting only the distinct ones).

The product of its digits is 150528, while the sum is 45.

The square root of 1187478126 is about 34459.8044974141. The cubic root of 1187478126 is about 1058.9493939603.

It can be divided in two parts, 11874 and 78126, that added together give a square (90000 = 300²).

The spelling of 1187478126 in words is "one billion, one hundred eighty-seven million, four hundred seventy-eight thousand, one hundred twenty-six".