1260289155 has 16 divisors (see below), whose sum is σ = 2044087200. Its totient is φ = 662946048.

The previous prime is 1260289109. The next prime is 1260289189. The reversal of 1260289155 is 5519820621.

It is not a de Polignac number, because 1260289155 - 2⁶ = 1260289091 is a prime.

It is a super-2 number, since 2×1260289155² = 3176657508421228050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 574380 + ... + 576569.

It is an arithmetic number, because the mean of its divisors is an integer number (127755450).

Almost surely, 2^1260289155 is an apocalyptic number.

1260289155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1260289155 is a deficient number, since it is larger than the sum of its proper divisors (783798045).

1260289155 is a wasteful number, since it uses less digits than its factorization.

1260289155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1151030.

The product of its (nonzero) digits is 43200, while the sum is 39.

The square root of 1260289155 is about 35500.5514745898. The cubic root of 1260289155 is about 1080.1649139456.

The spelling of 1260289155 in words is "one billion, two hundred sixty million, two hundred eighty-nine thousand, one hundred fifty-five".