1290455 has 8 divisors (see below), whose sum is σ = 1574304. Its totient is φ = 1015200.

The previous prime is 1290439. The next prime is 1290463. The reversal of 1290455 is 5540921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1290455 - 2⁴ = 1290439 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1811 + ... + 2420.

It is an arithmetic number, because the mean of its divisors is an integer number (196788).

2^1290455 is an apocalyptic number.

1290455 is a deficient number, since it is larger than the sum of its proper divisors (283849).

1290455 is an equidigital number, since it uses as much as digits as its factorization.

1290455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4297.

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 1290455 is about 1135.9819540820. The cubic root of 1290455 is about 108.8715204763.

The spelling of 1290455 in words is "one million, two hundred ninety thousand, four hundred fifty-five".