1217131 has 2 divisors, whose sum is σ = 1217132. Its totient is φ = 1217130.

The previous prime is 1217119. The next prime is 1217141. The reversal of 1217131 is 1317121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1217131 - 2⁹ = 1216619 is a prime.

It is a super-2 number, since 2×1217131² = 2962815742322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1217141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 608565 + 608566.

It is an arithmetic number, because the mean of its divisors is an integer number (608566).

2^1217131 is an apocalyptic number.

1217131 is a deficient number, since it is larger than the sum of its proper divisors (1).

1217131 is an equidigital number, since it uses as much as digits as its factorization.

1217131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 42, while the sum is 16.

The square root of 1217131 is about 1103.2366020034. The cubic root of 1217131 is about 106.7691473862.

The spelling of 1217131 in words is "one million, two hundred seventeen thousand, one hundred thirty-one".