121456 has 10 divisors (see below), whose sum is σ = 235352. Its totient is φ = 60720.

The previous prime is 121453. The next prime is 121469. The reversal of 121456 is 654121.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3780 + ... + 3811.

2¹²¹⁴⁵⁶ is an apocalyptic number.

121456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

121456 is a deficient number, since it is larger than the sum of its proper divisors (113896).

121456 is an equidigital number, since it uses as much as digits as its factorization.

121456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7599 (or 7593 counting only the distinct ones).

The product of its digits is 240, while the sum is 19.

The square root of 121456 is about 348.5053801593. The cubic root of 121456 is about 49.5229292132.

Adding to 121456 its reverse (654121), we get a palindrome (775577).

The spelling of 121456 in words is "one hundred twenty-one thousand, four hundred fifty-six".