1553121341 has 2 divisors, whose sum is σ = 1553121342. Its totient is φ = 1553121340.

The previous prime is 1553121329. The next prime is 1553121403. The reversal of 1553121341 is 1431213551.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1153960900 + 399160441 = 33970^2 + 19979^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1553121341 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1553121341.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1553120341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 776560670 + 776560671.

It is an arithmetic number, because the mean of its divisors is an integer number (776560671).

Almost surely, 2^1553121341 is an apocalyptic number.

It is an amenable number.

1553121341 is a deficient number, since it is larger than the sum of its proper divisors (1).

1553121341 is an equidigital number, since it uses as much as digits as its factorization.

1553121341 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1800, while the sum is 26.

The square root of 1553121341 is about 39409.6605034857. The cubic root of 1553121341 is about 1158.0708474308.

Adding to 1553121341 its reverse (1431213551), we get a palindrome (2984334892).

The spelling of 1553121341 in words is "one billion, five hundred fifty-three million, one hundred twenty-one thousand, three hundred forty-one".