121787465 has 4 divisors (see below), whose sum is σ = 146144964. Its totient is φ = 97429968.

The previous prime is 121787453. The next prime is 121787531. The reversal of 121787465 is 564787121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 564787121 = 10663 ⋅52967.

It can be written as a sum of positive squares in 2 ways, for example, as 55071241 + 66716224 = 7421^2 + 8168^2 .

It is a cyclic number.

It is not a de Polignac number, because 121787465 - 2⁶ = 121787401 is a prime.

It is a super-2 number, since 2×121787465² = 29664373262252450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12178742 + ... + 12178751.

It is an arithmetic number, because the mean of its divisors is an integer number (36536241).

Almost surely, 2^121787465 is an apocalyptic number.

It is an amenable number.

121787465 is a deficient number, since it is larger than the sum of its proper divisors (24357499).

121787465 is an equidigital number, since it uses as much as digits as its factorization.

121787465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24357498.

The product of its digits is 94080, while the sum is 41.

The square root of 121787465 is about 11035.7358159753. The cubic root of 121787465 is about 495.6793922379.

The spelling of 121787465 in words is "one hundred twenty-one million, seven hundred eighty-seven thousand, four hundred sixty-five".