1301391 has 36 divisors (see below), whose sum is σ = 2365272. Its totient is φ = 683424.

The previous prime is 1301389. The next prime is 1301393. The reversal of 1301391 is 1931031.

It is an interprime number because it is at equal distance from previous prime (1301389) and next prime (1301393).

It is not a de Polignac number, because 1301391 - 2¹ = 1301389 is a prime.

1301391 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1301393) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 5620 + ... + 5846.

It is an arithmetic number, because the mean of its divisors is an integer number (65702).

2^1301391 is an apocalyptic number.

1301391 is a deficient number, since it is larger than the sum of its proper divisors (1063881).

1301391 is a wasteful number, since it uses less digits than its factorization.

1301391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260 (or 250 counting only the distinct ones).

The product of its (nonzero) digits is 81, while the sum is 18.

The square root of 1301391 is about 1140.7852558654. The cubic root of 1301391 is about 109.1782007768.

It can be divided in two parts, 130 and 1391, that added together give a square (1521 = 39²).

The spelling of 1301391 in words is "one million, three hundred one thousand, three hundred ninety-one".