1215495 has 12 divisors (see below), whose sum is σ = 2106936. Its totient is φ = 648240.

The previous prime is 1215463. The next prime is 1215497. The reversal of 1215495 is 5945121.

It is not a de Polignac number, because 1215495 - 2⁵ = 1215463 is a prime.

1215495 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1215497) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13461 + ... + 13550.

It is an arithmetic number, because the mean of its divisors is an integer number (175578).

2^1215495 is an apocalyptic number.

1215495 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1215495 is a deficient number, since it is larger than the sum of its proper divisors (891441).

1215495 is a wasteful number, since it uses less digits than its factorization.

1215495 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27022 (or 27019 counting only the distinct ones).

The product of its digits is 1800, while the sum is 27.

The square root of 1215495 is about 1102.4948979474. The cubic root of 1215495 is about 106.7212882140.

It can be divided in two parts, 1 and 215495, that added together give a triangular number (215496 = T₆₅₆).

The spelling of 1215495 in words is "one million, two hundred fifteen thousand, four hundred ninety-five".