1290555 has 48 divisors (see below), whose sum is σ = 2718144. Its totient is φ = 552960.

The previous prime is 1290551. The next prime is 1290563. The reversal of 1290555 is 5550921.

It is not a de Polignac number, because 1290555 - 2² = 1290551 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1290551) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5235 + ... + 5475.

It is an arithmetic number, because the mean of its divisors is an integer number (56628).

2^1290555 is an apocalyptic number.

1290555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1290555 is an abundant number, since it is smaller than the sum of its proper divisors (1427589).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1290555 is a wasteful number, since it uses less digits than its factorization.

1290555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276 (or 273 counting only the distinct ones).

The product of its (nonzero) digits is 2250, while the sum is 27.

The square root of 1290555 is about 1136.0259680131. The cubic root of 1290555 is about 108.8743326293.

The spelling of 1290555 in words is "one million, two hundred ninety thousand, five hundred fifty-five".