1186871401 has 9 divisors (see below), whose sum is σ = 1214317911. Its totient is φ = 1160034072.

The previous prime is 1186871381. The next prime is 1186871407. The reversal of 1186871401 is 1041786811.

The square root of 1186871401 is 34451.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 1161105625 + 25765776 = 34075^2 + 5076^2 .

It is not a de Polignac number, because 1186871401 - 2⁹ = 1186870889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1186871407) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1618831 + ... + 1619563.

Almost surely, 2^1186871401 is an apocalyptic number.

1186871401 is the 34451-st square number.

1186871401 is the 17226-th centered octagonal number.

It is an amenable number.

1186871401 is a deficient number, since it is larger than the sum of its proper divisors (27446510).

1186871401 is an frugal number, since it uses more digits than its factorization.

1186871401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1560 (or 780 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 37.

The cubic root of 1186871401 is about 1058.7690115426.

The spelling of 1186871401 in words is "one billion, one hundred eighty-six million, eight hundred seventy-one thousand, four hundred one".