1260016155 has 20 divisors (see below), whose sum is σ = 2258696352. Its totient is φ = 672008400.

The previous prime is 1260016151. The next prime is 1260016159. The reversal of 1260016155 is 5516100621.

It is a happy number.

1260016155 is a `hidden beast` number, since 1 + 2 + 600 + 1 + 6 + 1 + 55 = 666.

It is an interprime number because it is at equal distance from previous prime (1260016151) and next prime (1260016159).

It is not a de Polignac number, because 1260016155 - 2² = 1260016151 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1260016151) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1555171 + ... + 1555980.

Almost surely, 2^1260016155 is an apocalyptic number.

1260016155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1260016155 is a deficient number, since it is larger than the sum of its proper divisors (998680197).

1260016155 is an equidigital number, since it uses as much as digits as its factorization.

1260016155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3111168 (or 3111159 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 27.

The square root of 1260016155 is about 35496.7062556514. The cubic root of 1260016155 is about 1080.0869143016.

Adding to 1260016155 its reverse (5516100621), we get a palindrome (6776116776).

The spelling of 1260016155 in words is "one billion, two hundred sixty million, sixteen thousand, one hundred fifty-five".