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1431431 = 7120161
BaseRepresentation
bin101011101011110000111
32200201112222
411131132013
5331301211
650402555
715111161
oct5353607
92621488
101431431
11898501
1259045b
133b1701
14293931
151d41db
hex15d787

1431431 has 4 divisors (see below), whose sum is σ = 1451664. Its totient is φ = 1411200.

The previous prime is 1431421. The next prime is 1431439. The reversal of 1431431 is 1341341.

Adding to 1431431 its reverse (1341341), we get a palindrome (2772772).

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1341341 = 7916979.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-1431431 is a prime.

It is a super-2 number, since 2×14314312 = 4097989415522, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1431439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10010 + ... + 10151.

It is an arithmetic number, because the mean of its divisors is an integer number (362916).

21431431 is an apocalyptic number.

1431431 is a deficient number, since it is larger than the sum of its proper divisors (20233).

1431431 is an equidigital number, since it uses as much as digits as its factorization.

1431431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20232.

The product of its digits is 144, while the sum is 17.

The square root of 1431431 is about 1196.4242558558. The cubic root of 1431431 is about 112.6998849722.

The spelling of 1431431 in words is "one million, four hundred thirty-one thousand, four hundred thirty-one".

Divisors: 1 71 20161 1431431