1291398 has 32 divisors (see below), whose sum is σ = 2737152. Its totient is φ = 405600.

The previous prime is 1291391. The next prime is 1291421. The reversal of 1291398 is 8931921.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1291391) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9793 + ... + 9923.

It is an arithmetic number, because the mean of its divisors is an integer number (85536).

2^1291398 is an apocalyptic number.

1291398 is an abundant number, since it is smaller than the sum of its proper divisors (1445754).

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

1291398 is a wasteful number, since it uses less digits than its factorization.

1291398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220.

The product of its digits is 3888, while the sum is 33.

The square root of 1291398 is about 1136.3969376939. The cubic root of 1291398 is about 108.8980333073.

The spelling of 1291398 in words is "one million, two hundred ninety-one thousand, three hundred ninety-eight".