1197427557 has 8 divisors (see below), whose sum is σ = 1680600160. Its totient is φ = 756270000.

The previous prime is 1197427547. The next prime is 1197427571. The reversal of 1197427557 is 7557247911.

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

It is not a de Polignac number, because 1197427557 - 2¹⁰ = 1197426533 is a prime.

It is a super-4 number, since 4×1197427557⁴ (a number of 37 digits) contains 4444 as substring. Note that it is a super-d number also for d = 3.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1197427547) 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, 10503694 + ... + 10503807.

It is an arithmetic number, because the mean of its divisors is an integer number (210075020).

Almost surely, 2^1197427557 is an apocalyptic number.

It is an amenable number.

1197427557 is a deficient number, since it is larger than the sum of its proper divisors (483172603).

1197427557 is a wasteful number, since it uses less digits than its factorization.

1197427557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21007523.

The product of its digits is 617400, while the sum is 48.

The square root of 1197427557 is about 34603.8662146298. The cubic root of 1197427557 is about 1061.8986846577.

The spelling of 1197427557 in words is "one billion, one hundred ninety-seven million, four hundred twenty-seven thousand, five hundred fifty-seven".