1261315 has 32 divisors (see below), whose sum is σ = 1866240. Its totient is φ = 806400.

The previous prime is 1261313. The next prime is 1261321. The reversal of 1261315 is 5131621.

It is not a de Polignac number, because 1261315 - 2¹ = 1261313 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a junction number, because it is equal to n+sod(n) for n = 1261292 and 1261301.

It is not an unprimeable number, because it can be changed into a prime (1261313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17730 + ... + 17800.

It is an arithmetic number, because the mean of its divisors is an integer number (58320).

2^1261315 is an apocalyptic number.

1261315 is a deficient number, since it is larger than the sum of its proper divisors (604925).

1261315 is a wasteful number, since it uses less digits than its factorization.

1261315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123.

The product of its digits is 180, while the sum is 19.

The square root of 1261315 is about 1123.0828108381. The cubic root of 1261315 is about 108.0457910532.

Adding to 1261315 its reverse (5131621), we get a palindrome (6392936).

It can be divided in two parts, 126 and 1315, that added together give a palindrome (1441).

The spelling of 1261315 in words is "one million, two hundred sixty-one thousand, three hundred fifteen".