121724386 has 16 divisors (see below), whose sum is σ = 220945536. Its totient is φ = 49098816.

The previous prime is 121724371. The next prime is 121724387. The reversal of 121724386 is 683427121.

It is a super-2 number, since 2×121724386² = 29633652294153992, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is not an unprimeable number, because it can be changed into a prime (121724387) 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, 255486 + ... + 255961.

It is an arithmetic number, because the mean of its divisors is an integer number (13809096).

Almost surely, 2^121724386 is an apocalyptic number.

121724386 is a deficient number, since it is larger than the sum of its proper divisors (99221150).

121724386 is a wasteful number, since it uses less digits than its factorization.

121724386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 511473.

The product of its digits is 16128, while the sum is 34.

The square root of 121724386 is about 11032.8775031721. The cubic root of 121724386 is about 495.5937995209.

The spelling of 121724386 in words is "one hundred twenty-one million, seven hundred twenty-four thousand, three hundred eighty-six".