121554005 has 8 divisors (see below), whose sum is σ = 147309624. Its totient is φ = 96280000.

The previous prime is 121553981. The next prime is 121554047. The reversal of 121554005 is 500455121.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 69338929 + 52215076 = 8327^2 + 7226^2 .

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

It is not a de Polignac number, because 121554005 - 2¹⁴ = 121537621 is a prime.

It is a super-2 number, since 2×121554005² = 29550752263080050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 119846 + ... + 120855.

It is an arithmetic number, because the mean of its divisors is an integer number (18413703).

Almost surely, 2^121554005 is an apocalyptic number.

It is an amenable number.

121554005 is a deficient number, since it is larger than the sum of its proper divisors (25755619).

121554005 is a wasteful number, since it uses less digits than its factorization.

121554005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240807.

The product of its (nonzero) digits is 1000, while the sum is 23.

The square root of 121554005 is about 11025.1532869162. The cubic root of 121554005 is about 495.3624594195.

The spelling of 121554005 in words is "one hundred twenty-one million, five hundred fifty-four thousand, five".