1285442634 has 16 divisors (see below), whose sum is σ = 2938154688. Its totient is φ = 367269312.

The previous prime is 1285442629. The next prime is 1285442647. The reversal of 1285442634 is 4362445821.

It is a junction number, because it is equal to n+sod(n) for n = 1285442592 and 1285442601.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15302847 + ... + 15302930.

It is an arithmetic number, because the mean of its divisors is an integer number (183634668).

Almost surely, 2^1285442634 is an apocalyptic number.

1285442634 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1285442634 is an abundant number, since it is smaller than the sum of its proper divisors (1652712054).

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

1285442634 is a wasteful number, since it uses less digits than its factorization.

1285442634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30605789.

The product of its digits is 184320, while the sum is 39.

The square root of 1285442634 is about 35853.0700777493. The cubic root of 1285442634 is about 1087.3037853422.

The spelling of 1285442634 in words is "one billion, two hundred eighty-five million, four hundred forty-two thousand, six hundred thirty-four".