1671431 has 2 divisors, whose sum is σ = 1671432. Its totient is φ = 1671430.

The previous prime is 1671421. The next prime is 1671437. The reversal of 1671431 is 1341761.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1671431 - 2¹⁰ = 1670407 is a prime.

It is a super-2 number, since 2×1671431² = 5587363175522, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1671397 and 1671406.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1671437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 835715 + 835716.

It is an arithmetic number, because the mean of its divisors is an integer number (835716).

2^1671431 is an apocalyptic number.

1671431 is a deficient number, since it is larger than the sum of its proper divisors (1).

1671431 is an equidigital number, since it uses as much as digits as its factorization.

1671431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 504, while the sum is 23.

The square root of 1671431 is about 1292.8383502975. The cubic root of 1671431 is about 118.6759775059.

The spelling of 1671431 in words is "one million, six hundred seventy-one thousand, four hundred thirty-one".