1187621742 has 16 divisors (see below), whose sum is σ = 2376070992. Its totient is φ = 395736000.

The previous prime is 1187621719. The next prime is 1187621759. The reversal of 1187621742 is 2471267811.

It is a super-2 number, since 2×1187621742² = 2820890804142229128, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1187621742.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14973 + ... + 50984.

It is an arithmetic number, because the mean of its divisors is an integer number (148504437).

Almost surely, 2^1187621742 is an apocalyptic number.

1187621742 is an abundant number, since it is smaller than the sum of its proper divisors (1188449250).

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

1187621742 is a wasteful number, since it uses less digits than its factorization.

1187621742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68963.

The product of its digits is 37632, while the sum is 39.

The square root of 1187621742 is about 34461.8882535476. Note that the first 3 decimals coincide. The cubic root of 1187621742 is about 1058.9920827313.

The spelling of 1187621742 in words is "one billion, one hundred eighty-seven million, six hundred twenty-one thousand, seven hundred forty-two".