1290135 has 32 divisors (see below), whose sum is σ = 2575872. Its totient is φ = 535680.

The previous prime is 1290131. The next prime is 1290143. The reversal of 1290135 is 5310921.

It is not a de Polignac number, because 1290135 - 2² = 1290131 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1290131) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 597 + ... + 1713.

It is an arithmetic number, because the mean of its divisors is an integer number (80496).

2^1290135 is an apocalyptic number.

1290135 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1290135 is a deficient number, since it is larger than the sum of its proper divisors (1285737).

1290135 is a wasteful number, since it uses less digits than its factorization.

1290135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1143.

The product of its (nonzero) digits is 270, while the sum is 21.

The square root of 1290135 is about 1135.8410980414. The cubic root of 1290135 is about 108.8625206102.

The spelling of 1290135 in words is "one million, two hundred ninety thousand, one hundred thirty-five".