1555141201 has 2 divisors, whose sum is σ = 1555141202. Its totient is φ = 1555141200.

The previous prime is 1555141199. The next prime is 1555141223. The reversal of 1555141201 is 1021415551.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1532331025 + 22810176 = 39145^2 + 4776^2 .

It is a cyclic number.

It is not a de Polignac number, because 1555141201 - 2¹ = 1555141199 is a prime.

Together with 1555141199, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1555141001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 777570600 + 777570601.

It is an arithmetic number, because the mean of its divisors is an integer number (777570601).

Almost surely, 2^1555141201 is an apocalyptic number.

It is an amenable number.

1555141201 is a deficient number, since it is larger than the sum of its proper divisors (1).

1555141201 is an equidigital number, since it uses as much as digits as its factorization.

1555141201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1000, while the sum is 25.

The square root of 1555141201 is about 39435.2786347453. The cubic root of 1555141201 is about 1158.5726600541.

Adding to 1555141201 its reverse (1021415551), we get a palindrome (2576556752).

The spelling of 1555141201 in words is "one billion, five hundred fifty-five million, one hundred forty-one thousand, two hundred one".