1276155 has 40 divisors (see below), whose sum is σ = 2404512. Its totient is φ = 646272.

The previous prime is 1276147. The next prime is 1276157. The reversal of 1276155 is 5516721.

It is not a de Polignac number, because 1276155 - 2³ = 1276147 is a prime.

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

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1276157) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 9247 + ... + 9383.

2^1276155 is an apocalyptic number.

1276155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1276155 is a deficient number, since it is larger than the sum of its proper divisors (1128357).

1276155 is a wasteful number, since it uses less digits than its factorization.

1276155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177 (or 168 counting only the distinct ones).

The product of its digits is 2100, while the sum is 27.

The square root of 1276155 is about 1129.6703058857. The cubic root of 1276155 is about 108.4678775415.

It can be divided in two parts, 1276 and 155, that added together give a triangular number (1431 = T₅₃).

The spelling of 1276155 in words is "one million, two hundred seventy-six thousand, one hundred fifty-five".