1187490972 has 12 divisors (see below), whose sum is σ = 2770812296. Its totient is φ = 395830320.

The previous prime is 1187490961. The next prime is 1187490973. The reversal of 1187490972 is 2790947811.

1187490972 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1187490973) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49478779 + ... + 49478802.

Almost surely, 2^1187490972 is an apocalyptic number.

1187490972 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1187490972 is an abundant number, since it is smaller than the sum of its proper divisors (1583321324).

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

1187490972 is a wasteful number, since it uses less digits than its factorization.

1187490972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98957588 (or 98957586 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 48.

The square root of 1187490972 is about 34459.9908879849. The cubic root of 1187490972 is about 1058.9532124769.

The spelling of 1187490972 in words is "one billion, one hundred eighty-seven million, four hundred ninety thousand, nine hundred seventy-two".