755121557 has 8 divisors (see below), whose sum is σ = 766873536. Its totient is φ = 743383872.

The previous prime is 755121511. The next prime is 755121583.

755121557 is nontrivially palindromic in base 10.

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 755121557 - 2¹⁰ = 755120533 is a prime.

It is a super-2 number, since 2×755121557² = 1140417131692208498, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 755121557.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (755127557) 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, 159608 + ... + 164270.

It is an arithmetic number, because the mean of its divisors is an integer number (95859192).

Almost surely, 2^755121557 is an apocalyptic number.

It is an amenable number.

755121557 is a deficient number, since it is larger than the sum of its proper divisors (11751979).

755121557 is a wasteful number, since it uses less digits than its factorization.

755121557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7147.

The product of its digits is 61250, while the sum is 38.

The square root of 755121557 is about 27479.4751951343. The cubic root of 755121557 is about 910.6237148220.

The spelling of 755121557 in words is "seven hundred fifty-five million, one hundred twenty-one thousand, five hundred fifty-seven".