1291213 has 16 divisors (see below), whose sum is σ = 1653120. Its totient is φ = 979200.

The previous prime is 1291211. The next prime is 1291217. The reversal of 1291213 is 3121921.

It is a cyclic number.

It is not a de Polignac number, because 1291213 - 2¹ = 1291211 is a prime.

It is a super-2 number, since 2×1291213² = 3334462022738, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1291211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2953 + ... + 3361.

It is an arithmetic number, because the mean of its divisors is an integer number (103320).

2^1291213 is an apocalyptic number.

It is an amenable number.

1291213 is a deficient number, since it is larger than the sum of its proper divisors (361907).

1291213 is a wasteful number, since it uses less digits than its factorization.

1291213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 468.

The product of its digits is 108, while the sum is 19.

The square root of 1291213 is about 1136.3155371639. The cubic root of 1291213 is about 108.8928329745.

The spelling of 1291213 in words is "one million, two hundred ninety-one thousand, two hundred thirteen".