121605452 has 24 divisors (see below), whose sum is σ = 216986112. Its totient is φ = 59616000.

The previous prime is 121605443. The next prime is 121605457. The reversal of 121605452 is 254506121.

It is a super-2 number, since 2×121605452² = 29575771912248608, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (121605457) 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, 105077 + ... + 106227.

It is an arithmetic number, because the mean of its divisors is an integer number (9041088).

Almost surely, 2^121605452 is an apocalyptic number.

It is an amenable number.

121605452 is a deficient number, since it is larger than the sum of its proper divisors (95380660).

121605452 is a wasteful number, since it uses less digits than its factorization.

121605452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1649 (or 1647 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 121605452 is about 11027.4862049336. The cubic root of 121605452 is about 495.4323359539.

The spelling of 121605452 in words is "one hundred twenty-one million, six hundred five thousand, four hundred fifty-two".