121435456 has 14 divisors (see below), whose sum is σ = 240973610. Its totient is φ = 60717696.

The previous prime is 121435453. The next prime is 121435459. The reversal of 121435456 is 654534121.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (121435453) and next prime (121435459).

It can be written as a sum of positive squares in only one way, i.e., 87609600 + 33825856 = 9360^2 + 5816^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121435453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 948651 + ... + 948778.

Almost surely, 2^121435456 is an apocalyptic number.

121435456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

121435456 is a deficient number, since it is larger than the sum of its proper divisors (119538154).

121435456 is an equidigital number, since it uses as much as digits as its factorization.

121435456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1897441 (or 1897431 counting only the distinct ones).

The product of its digits is 14400, while the sum is 31.

The square root of 121435456 is about 11019.7756782976. The cubic root of 121435456 is about 495.2013682635.

Adding to 121435456 its reverse (654534121), we get a palindrome (775969577).

The spelling of 121435456 in words is "one hundred twenty-one million, four hundred thirty-five thousand, four hundred fifty-six".