1285490 has 8 divisors (see below), whose sum is σ = 2313900. Its totient is φ = 514192.

The previous prime is 1285481. The next prime is 1285507. The reversal of 1285490 is 945821.

It can be written as a sum of positive squares in 2 ways, for example, as 1042441 + 243049 = 1021^2 + 493^2 .

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

It is a plaindrome in base 14.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64265 + ... + 64284.

2^1285490 is an apocalyptic number.

1285490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1285490 is a deficient number, since it is larger than the sum of its proper divisors (1028410).

1285490 is a wasteful number, since it uses less digits than its factorization.

1285490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128556.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 1285490 is about 1133.7945140104. The cubic root of 1285490 is about 108.7317140171.

The spelling of 1285490 in words is "one million, two hundred eighty-five thousand, four hundred ninety".