121457399 has 8 divisors (see below), whose sum is σ = 140880768. Its totient is φ = 102552120.

The previous prime is 121457393. The next prime is 121457417. The reversal of 121457399 is 993754121.

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

It is a cyclic number.

It is not a de Polignac number, because 121457399 - 2¹² = 121453303 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121457393) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 129017 + ... + 129954.

It is an arithmetic number, because the mean of its divisors is an integer number (17610096).

Almost surely, 2^121457399 is an apocalyptic number.

121457399 is a deficient number, since it is larger than the sum of its proper divisors (19423369).

121457399 is an equidigital number, since it uses as much as digits as its factorization.

121457399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259045.

The product of its digits is 68040, while the sum is 41.

The square root of 121457399 is about 11020.7712525032. The cubic root of 121457399 is about 495.2311935703.

The spelling of 121457399 in words is "one hundred twenty-one million, four hundred fifty-seven thousand, three hundred ninety-nine".