1285801072 has 20 divisors (see below), whose sum is σ = 2577145320. Its totient is φ = 620731328.

The previous prime is 1285801063. The next prime is 1285801081. The reversal of 1285801072 is 2701085821.

It is an interprime number because it is at equal distance from previous prime (1285801063) and next prime (1285801081).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1385098 + ... + 1386025.

It is an arithmetic number, because the mean of its divisors is an integer number (128857266).

Almost surely, 2^1285801072 is an apocalyptic number.

It is an amenable number.

1285801072 is an abundant number, since it is smaller than the sum of its proper divisors (1291344248).

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

1285801072 is a wasteful number, since it uses less digits than its factorization.

1285801072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2771160 (or 2771154 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 34.

The square root of 1285801072 is about 35858.0684365458. The cubic root of 1285801072 is about 1087.4048386719.

Adding to 1285801072 its reverse (2701085821), we get a palindrome (3986886893).

The spelling of 1285801072 in words is "one billion, two hundred eighty-five million, eight hundred one thousand, seventy-two".