1552411121 has 4 divisors (see below), whose sum is σ = 1552491072. Its totient is φ = 1552331172.

The previous prime is 1552411111. The next prime is 1552411141. The reversal of 1552411121 is 1211142551.

It is a happy number.

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, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1211142551 = 467 ⋅2593453.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1552411121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1552411111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9860 + ... + 56586.

It is an arithmetic number, because the mean of its divisors is an integer number (388122768).

Almost surely, 2^1552411121 is an apocalyptic number.

It is an amenable number.

1552411121 is a deficient number, since it is larger than the sum of its proper divisors (79951).

1552411121 is an equidigital number, since it uses as much as digits as its factorization.

1552411121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79950.

The product of its digits is 400, while the sum is 23.

The square root of 1552411121 is about 39400.6487383139. The cubic root of 1552411121 is about 1157.8942974820.

Adding to 1552411121 its reverse (1211142551), we get a palindrome (2763553672).

The spelling of 1552411121 in words is "one billion, five hundred fifty-two million, four hundred eleven thousand, one hundred twenty-one".