121428953 has 4 divisors (see below), whose sum is σ = 125346048. Its totient is φ = 117511860.

The previous prime is 121428919. The next prime is 121428959. The reversal of 121428953 is 359824121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 121428953 - 2⁶ = 121428889 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (121428959) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1958501 + ... + 1958562.

It is an arithmetic number, because the mean of its divisors is an integer number (31336512).

Almost surely, 2^121428953 is an apocalyptic number.

It is an amenable number.

121428953 is a deficient number, since it is larger than the sum of its proper divisors (3917095).

121428953 is an equidigital number, since it uses as much as digits as its factorization.

121428953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3917094.

The product of its digits is 17280, while the sum is 35.

The square root of 121428953 is about 11019.4806138946. The cubic root of 121428953 is about 495.1925285828.

The spelling of 121428953 in words is "one hundred twenty-one million, four hundred twenty-eight thousand, nine hundred fifty-three".