1212431 has 4 divisors (see below), whose sum is σ = 1322664. Its totient is φ = 1102200.

The previous prime is 1212427. The next prime is 1212433. The reversal of 1212431 is 1342121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1342121 = 11 ⋅122011.

It is not a de Polignac number, because 1212431 - 2² = 1212427 is a prime.

It is a super-2 number, since 2×1212431² = 2939977859522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212433) 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 3 ways as a sum of consecutive naturals, for example, 55100 + ... + 55121.

It is an arithmetic number, because the mean of its divisors is an integer number (330666).

2^1212431 is an apocalyptic number.

1212431 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1212431 is a deficient number, since it is larger than the sum of its proper divisors (110233).

1212431 is a wasteful number, since it uses less digits than its factorization.

1212431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110232.

The product of its digits is 48, while the sum is 14.

The square root of 1212431 is about 1101.1044455455. The cubic root of 1212431 is about 106.6315389972.

Adding to 1212431 its reverse (1342121), we get a palindrome (2554552).

It can be divided in two parts, 121 and 2431, that added together give a palindrome (2552).

The spelling of 1212431 in words is "one million, two hundred twelve thousand, four hundred thirty-one".