1285434 has 12 divisors (see below), whose sum is σ = 2785146. Its totient is φ = 428472.

The previous prime is 1285429. The next prime is 1285441. The reversal of 1285434 is 4345821.

It can be written as a sum of positive squares in only one way, i.e., 1096209 + 189225 = 1047^2 + 435^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1285398 and 1285407.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 35689 + ... + 35724.

2^1285434 is an apocalyptic number.

1285434 is an abundant number, since it is smaller than the sum of its proper divisors (1499712).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1285434 is a wasteful number, since it uses less digits than its factorization.

1285434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71421 (or 71418 counting only the distinct ones).

The product of its digits is 3840, while the sum is 27.

The square root of 1285434 is about 1133.7698179084. The cubic root of 1285434 is about 108.7301350953.

The spelling of 1285434 in words is "one million, two hundred eighty-five thousand, four hundred thirty-four".