1287420553 has 8 divisors (see below), whose sum is σ = 1303662528. Its totient is φ = 1271196144.

The previous prime is 1287420539. The next prime is 1287420571. The reversal of 1287420553 is 3550247821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1287420553 - 2⁵ = 1287420521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1287420503) 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, 204651 + ... + 210847.

It is an arithmetic number, because the mean of its divisors is an integer number (162957816).

Almost surely, 2^1287420553 is an apocalyptic number.

It is an amenable number.

1287420553 is a deficient number, since it is larger than the sum of its proper divisors (16241975).

1287420553 is an equidigital number, since it uses as much as digits as its factorization.

1287420553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8783.

The product of its (nonzero) digits is 67200, while the sum is 37.

The square root of 1287420553 is about 35880.6431519838. The cubic root of 1287420553 is about 1087.8611800362.

The spelling of 1287420553 in words is "one billion, two hundred eighty-seven million, four hundred twenty thousand, five hundred fifty-three".