1401132861 has 24 divisors (see below), whose sum is σ = 2058900480. Its totient is φ = 918025056.

The previous prime is 1401132853. The next prime is 1401132869. The reversal of 1401132861 is 1682311041.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1401132853) and next prime (1401132869).

It is not a de Polignac number, because 1401132861 - 2³ = 1401132853 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1401132869) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 154135 + ... + 162971.

It is an arithmetic number, because the mean of its divisors is an integer number (85787520).

Almost surely, 2^1401132861 is an apocalyptic number.

It is an amenable number.

1401132861 is a deficient number, since it is larger than the sum of its proper divisors (657767619).

1401132861 is a wasteful number, since it uses less digits than its factorization.

1401132861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9145 (or 9142 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 1401132861 is about 37431.7092984010. The cubic root of 1401132861 is about 1118.9906033659.

The spelling of 1401132861 in words is "one billion, four hundred one million, one hundred thirty-two thousand, eight hundred sixty-one".