1351565 has 16 divisors (see below), whose sum is σ = 1753920. Its totient is φ = 996480.

The previous prime is 1351547. The next prime is 1351589. The reversal of 1351565 is 5651531.

It is not a de Polignac number, because 1351565 - 2⁸ = 1351309 is a prime.

It is a plaindrome in base 9.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3722 + ... + 4068.

It is an arithmetic number, because the mean of its divisors is an integer number (109620).

2^1351565 is an apocalyptic number.

It is an amenable number.

1351565 is a deficient number, since it is larger than the sum of its proper divisors (402355).

1351565 is a wasteful number, since it uses less digits than its factorization.

1351565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 412.

The product of its digits is 2250, while the sum is 26.

The square root of 1351565 is about 1162.5682775648. The cubic root of 1351565 is about 110.5636359431.

It can be divided in two parts, 13515 and 65, that multiplied together give a triangular number (878475 = T₁₃₂₅).

The spelling of 1351565 in words is "one million, three hundred fifty-one thousand, five hundred sixty-five".