1381261 has 8 divisors (see below), whose sum is σ = 1611200. Its totient is φ = 1183644.

The previous prime is 1381231. The next prime is 1381271. The reversal of 1381261 is 1621831.

It is not a de Polignac number, because 1381261 - 2⁵ = 1381229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1381231) 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, 1671 + ... + 2356.

It is an arithmetic number, because the mean of its divisors is an integer number (201400).

2^1381261 is an apocalyptic number.

It is an amenable number.

1381261 is a deficient number, since it is larger than the sum of its proper divisors (229939).

1381261 is an frugal number, since it uses more digits than its factorization.

1381261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4048 (or 4034 counting only the distinct ones).

The product of its digits is 288, while the sum is 22.

The square root of 1381261 is about 1175.2706071369. The cubic root of 1381261 is about 111.3675288683.

The spelling of 1381261 in words is "one million, three hundred eighty-one thousand, two hundred sixty-one".