1289772552 has 32 divisors (see below), whose sum is σ = 3249053280. Its totient is φ = 426641280.

The previous prime is 1289772551. The next prime is 1289772553. The reversal of 1289772552 is 2552779821.

It is an interprime number because it is at equal distance from previous prime (1289772551) and next prime (1289772553).

It is not an unprimeable number, because it can be changed into a prime (1289772551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 201973 + ... + 208260.

It is an arithmetic number, because the mean of its divisors is an integer number (101532915).

Almost surely, 2^1289772552 is an apocalyptic number.

1289772552 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1289772552 is an abundant number, since it is smaller than the sum of its proper divisors (1959280728).

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

1289772552 is a wasteful number, since it uses less digits than its factorization.

1289772552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410373 (or 410369 counting only the distinct ones).

The product of its digits is 705600, while the sum is 48.

The square root of 1289772552 is about 35913.4035145654. The cubic root of 1289772552 is about 1088.5232511423.

The spelling of 1289772552 in words is "one billion, two hundred eighty-nine million, seven hundred seventy-two thousand, five hundred fifty-two".