1351 has 4 divisors (see below), whose sum is σ = 1552. Its totient is φ = 1152.

The previous prime is 1327. The next prime is 1361. The reversal of 1351 is 1531.

It is a semiprime because it is the product of two primes.

It is a 7-Lehmer number, since φ(1351) divides (1351-1)⁷.

It is a cyclic number.

It is not a de Polignac number, because 1351 - 2⁵ = 1319 is a prime.

It is a cake number, because a cake can be divided into 1351 parts by 20 planar cuts.

It is a Duffinian number.

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90 + ... + 103.

It is an arithmetic number, because the mean of its divisors is an integer number (388).

2¹³⁵¹ is an apocalyptic number.

1351 is a deficient number, since it is larger than the sum of its proper divisors (201).

1351 is an equidigital number, since it uses as much as digits as its factorization.

1351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200.

The product of its digits is 15, while the sum is 10.

The square root of 1351 is about 36.7559518990. The cubic root of 1351 is about 11.0548227346.

Adding to 1351 its reverse (1531), we get a palindrome (2882).

It can be divided in two parts, 135 and 1, that added together give a triangular number (136 = T₁₆).

The spelling of 1351 in words is "one thousand, three hundred fifty-one".