1431287 has 8 divisors (see below), whose sum is σ = 1681680. Its totient is φ = 1200960.

The previous prime is 1431277. The next prime is 1431307. The reversal of 1431287 is 7821341.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1431287 - 2⁶ = 1431223 is a prime.

1431287 is a modest number, since divided by 1287 gives 143 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1431217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4862 + ... + 5147.

It is an arithmetic number, because the mean of its divisors is an integer number (210210).

2^1431287 is an apocalyptic number.

1431287 is a deficient number, since it is larger than the sum of its proper divisors (250393).

1431287 is a wasteful number, since it uses less digits than its factorization.

1431287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10033.

The product of its digits is 1344, while the sum is 26.

The square root of 1431287 is about 1196.3640750206. The cubic root of 1431287 is about 112.6961056941.

It can be divided in two parts, 143 and 1287, that multiplied together give a square (184041 = 429²).

The spelling of 1431287 in words is "one million, four hundred thirty-one thousand, two hundred eighty-seven".