1121431 has 2 divisors, whose sum is σ = 1121432. Its totient is φ = 1121430.

The previous prime is 1121423. The next prime is 1121443. The reversal of 1121431 is 1341211.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1121431 - 2³ = 1121423 is a prime.

It is a super-2 number, since 2×1121431² = 2515214975522, which contains 22 as substring.

1121431 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1121231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560715 + 560716.

It is an arithmetic number, because the mean of its divisors is an integer number (560716).

2^1121431 is an apocalyptic number.

1121431 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121431 is an equidigital number, since it uses as much as digits as its factorization.

1121431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24, while the sum is 13.

The square root of 1121431 is about 1058.9763925603. The cubic root of 1121431 is about 103.8940921366.

Adding to 1121431 its reverse (1341211), we get a palindrome (2462642).

The spelling of 1121431 in words is "one million, one hundred twenty-one thousand, four hundred thirty-one".