1555451141 has 4 divisors (see below), whose sum is σ = 1558855212. Its totient is φ = 1552047072.

The previous prime is 1555451137. The next prime is 1555451143. The reversal of 1555451141 is 1411545551.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 608658241 + 946792900 = 24671^2 + 30770^2 .

It is a cyclic number.

It is not a de Polignac number, because 1555451141 - 2² = 1555451137 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1555451098 and 1555451107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1555451143) 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, 1701350 + ... + 1702263.

It is an arithmetic number, because the mean of its divisors is an integer number (389713803).

Almost surely, 2^1555451141 is an apocalyptic number.

It is an amenable number.

1555451141 is a deficient number, since it is larger than the sum of its proper divisors (3404071).

1555451141 is an equidigital number, since it uses as much as digits as its factorization.

1555451141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3404070.

The product of its digits is 10000, while the sum is 32.

The square root of 1555451141 is about 39439.2081690290. The cubic root of 1555451141 is about 1158.6496228742.

Adding to 1555451141 its reverse (1411545551), we get a palindrome (2966996692).

The spelling of 1555451141 in words is "one billion, five hundred fifty-five million, four hundred fifty-one thousand, one hundred forty-one".