1285026420 has 24 divisors (see below), whose sum is σ = 3598074144. Its totient is φ = 342673696.

The previous prime is 1285026419. The next prime is 1285026437. The reversal of 1285026420 is 246205821.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10708494 + ... + 10708613.

It is an arithmetic number, because the mean of its divisors is an integer number (149919756).

Almost surely, 2^1285026420 is an apocalyptic number.

1285026420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1285026420 is an abundant number, since it is smaller than the sum of its proper divisors (2313047724).

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

1285026420 is a wasteful number, since it uses less digits than its factorization.

1285026420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21417119 (or 21417117 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 30.

The square root of 1285026420 is about 35847.2651676526. The cubic root of 1285026420 is about 1087.1864198271.

The spelling of 1285026420 in words is "one billion, two hundred eighty-five million, twenty-six thousand, four hundred twenty".