1212491 has 16 divisors (see below), whose sum is σ = 1534464. Its totient is φ = 933504.

The previous prime is 1212487. The next prime is 1212517. The reversal of 1212491 is 1942121.

It is not a de Polignac number, because 1212491 - 2² = 1212487 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2516 + ... + 2958.

It is an arithmetic number, because the mean of its divisors is an integer number (95904).

2^1212491 is an apocalyptic number.

1212491 is a deficient number, since it is larger than the sum of its proper divisors (321973).

1212491 is a wasteful number, since it uses less digits than its factorization.

1212491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 490.

The product of its digits is 144, while the sum is 20.

The square root of 1212491 is about 1101.1316905802. The cubic root of 1212491 is about 106.6332979390.

The spelling of 1212491 in words is "one million, two hundred twelve thousand, four hundred ninety-one".