1260144155 has 8 divisors (see below), whose sum is σ = 1515280992. Its totient is φ = 1006043328.

The previous prime is 1260144121. The next prime is 1260144157. The reversal of 1260144155 is 5514410621.

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 1260144155 - 2²⁴ = 1243366939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1260144157) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 256322 + ... + 261191.

It is an arithmetic number, because the mean of its divisors is an integer number (189410124).

Almost surely, 2^1260144155 is an apocalyptic number.

1260144155 is a deficient number, since it is larger than the sum of its proper divisors (255136837).

1260144155 is an equidigital number, since it uses as much as digits as its factorization.

1260144155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 518005.

The product of its (nonzero) digits is 4800, while the sum is 29.

The square root of 1260144155 is about 35498.5091940493. The cubic root of 1260144155 is about 1080.1234869660.

Adding to 1260144155 its reverse (5514410621), we get a palindrome (6774554776).

The spelling of 1260144155 in words is "one billion, two hundred sixty million, one hundred forty-four thousand, one hundred fifty-five".