1001431 has 2 divisors, whose sum is σ = 1001432. Its totient is φ = 1001430.

The previous prime is 1001411. The next prime is 1001447. The reversal of 1001431 is 1341001.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1001431 - 2⁷ = 1001303 is a prime.

It is a super-2 number, since 2×1001431² = 2005728095522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1001401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500715 + 500716.

It is an arithmetic number, because the mean of its divisors is an integer number (500716).

2^1001431 is an apocalyptic number.

1001431 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001431 is an equidigital number, since it uses as much as digits as its factorization.

1001431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 1001431 is about 1000.7152442129. The cubic root of 1001431 is about 100.0476772652.

Adding to 1001431 its reverse (1341001), we get a palindrome (2342432).

The spelling of 1001431 in words is "one million, one thousand, four hundred thirty-one".