1555400141 has 8 divisors (see below), whose sum is σ = 1578380160. Its totient is φ = 1532562048.

The previous prime is 1555400129. The next prime is 1555400179. The reversal of 1555400141 is 1410045551.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1555400141 - 2¹⁰ = 1555399117 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1555400141.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1555400741) 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 7 ways as a sum of consecutive naturals, for example, 13301 + ... + 57338.

It is an arithmetic number, because the mean of its divisors is an integer number (197297520).

Almost surely, 2^1555400141 is an apocalyptic number.

It is an amenable number.

1555400141 is a deficient number, since it is larger than the sum of its proper divisors (22980019).

1555400141 is an equidigital number, since it uses as much as digits as its factorization.

1555400141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70963.

The product of its (nonzero) digits is 2000, while the sum is 26.

The square root of 1555400141 is about 39438.5615990239. The cubic root of 1555400141 is about 1158.6369595006.

Adding to 1555400141 its reverse (1410045551), we get a palindrome (2965445692).

The spelling of 1555400141 in words is "one billion, five hundred fifty-five million, four hundred thousand, one hundred forty-one".