1386843261 has 8 divisors (see below), whose sum is σ = 1857061440. Its totient is φ = 920593632.

The previous prime is 1386843253. The next prime is 1386843281. The reversal of 1386843261 is 1623486831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1386843261 - 2³ = 1386843253 is a prime.

It is a super-2 number, since 2×1386843261² = 3846668461162228242, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1386843281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 991321 + ... + 992718.

It is an arithmetic number, because the mean of its divisors is an integer number (232132680).

Almost surely, 2^1386843261 is an apocalyptic number.

It is an amenable number.

1386843261 is a deficient number, since it is larger than the sum of its proper divisors (470218179).

1386843261 is a wasteful number, since it uses less digits than its factorization.

1386843261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1984275.

The product of its digits is 165888, while the sum is 42.

The square root of 1386843261 is about 37240.3445338520. The cubic root of 1386843261 is about 1115.1735500398.

The spelling of 1386843261 in words is "one billion, three hundred eighty-six million, eight hundred forty-three thousand, two hundred sixty-one".