1971315 has 24 divisors (see below), whose sum is σ = 3470688. Its totient is φ = 1034880.

The previous prime is 1971313. The next prime is 1971329. The reversal of 1971315 is 5131791.

It is a happy number.

It is not a de Polignac number, because 1971315 - 2¹ = 1971313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1971313) 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 23 ways as a sum of consecutive naturals, for example, 2887 + ... + 3503.

It is an arithmetic number, because the mean of its divisors is an integer number (144612).

2^1971315 is an apocalyptic number.

1971315 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1971315 is a deficient number, since it is larger than the sum of its proper divisors (1499373).

1971315 is a wasteful number, since it uses less digits than its factorization.

1971315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 699 (or 696 counting only the distinct ones).

The product of its digits is 945, while the sum is 27.

The square root of 1971315 is about 1404.0352559676. The cubic root of 1971315 is about 125.3868548449.

It can be divided in two parts, 197131 and 5, that added together give a square (197136 = 444²).

The spelling of 1971315 in words is "one million, nine hundred seventy-one thousand, three hundred fifteen".