121420493 has 4 divisors (see below), whose sum is σ = 122165568. Its totient is φ = 120675420.

The previous prime is 121420391. The next prime is 121420501. The reversal of 121420493 is 394024121.

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 not a de Polignac number, because 121420493 - 2¹⁰ = 121419469 is a prime.

It is a super-2 number, since 2×121420493² = 29485872240726098, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121420993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 372293 + ... + 372618.

It is an arithmetic number, because the mean of its divisors is an integer number (30541392).

Almost surely, 2^121420493 is an apocalyptic number.

It is an amenable number.

121420493 is a deficient number, since it is larger than the sum of its proper divisors (745075).

121420493 is an equidigital number, since it uses as much as digits as its factorization.

121420493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 745074.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 121420493 is about 11019.0967415664. The cubic root of 121420493 is about 495.1810282336.

The spelling of 121420493 in words is "one hundred twenty-one million, four hundred twenty thousand, four hundred ninety-three".