1285777352 has 16 divisors (see below), whose sum is σ = 2413340160. Its totient is φ = 642219984.

The previous prime is 1285777351. The next prime is 1285777373. The reversal of 1285777352 is 2537775821.

It is a super-2 number, since 2×1285777352² = 3306446797832263808, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1285777297 and 1285777306.

It is not an unprimeable number, because it can be changed into a prime (1285777351) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75368 + ... + 90839.

It is an arithmetic number, because the mean of its divisors is an integer number (150833760).

Almost surely, 2^1285777352 is an apocalyptic number.

It is an amenable number.

1285777352 is a deficient number, since it is larger than the sum of its proper divisors (1127562808).

1285777352 is a wasteful number, since it uses less digits than its factorization.

1285777352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167180 (or 167176 counting only the distinct ones).

The product of its digits is 823200, while the sum is 47.

The square root of 1285777352 is about 35857.7376865859. The cubic root of 1285777352 is about 1087.3981519451.

It can be divided in two parts, 12857 and 77352, that added together give a palindrome (90209).

The spelling of 1285777352 in words is "one billion, two hundred eighty-five million, seven hundred seventy-seven thousand, three hundred fifty-two".