1551134121 has 4 divisors (see below), whose sum is σ = 2068178832. Its totient is φ = 1034089412.

The previous prime is 1551134119. The next prime is 1551134153. The reversal of 1551134121 is 1214311551.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1551134121 - 2¹ = 1551134119 is a prime.

It is a super-2 number, since 2×1551134121² = 4812034122660885282, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1551134091 and 1551134100.

It is not an unprimeable number, because it can be changed into a prime (1551134161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 258522351 + ... + 258522356.

It is an arithmetic number, because the mean of its divisors is an integer number (517044708).

Almost surely, 2^1551134121 is an apocalyptic number.

It is an amenable number.

1551134121 is a deficient number, since it is larger than the sum of its proper divisors (517044711).

1551134121 is an equidigital number, since it uses as much as digits as its factorization.

1551134121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 517044710.

The product of its digits is 600, while the sum is 24.

The square root of 1551134121 is about 39384.4400874254. The cubic root of 1551134121 is about 1157.5767190993.

Adding to 1551134121 its reverse (1214311551), we get a palindrome (2765445672).

The spelling of 1551134121 in words is "one billion, five hundred fifty-one million, one hundred thirty-four thousand, one hundred twenty-one".