121257486 has 84 divisors (see below), whose sum is σ = 314547912. Its totient is φ = 34327152.

The previous prime is 121257431. The next prime is 121257491. The reversal of 121257486 is 684752121.

121257486 is a `hidden beast` number, since 1 + 2 + 1 + 2 + 574 + 86 = 666.

It is a super-2 number, since 2×121257486² = 29406755822080392, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 121257486.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 41 ways as a sum of consecutive naturals, for example, 1112400 + ... + 1112508.

It is an arithmetic number, because the mean of its divisors is an integer number (3744618).

Almost surely, 2^121257486 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121257486, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (157273956).

121257486 is an abundant number, since it is smaller than the sum of its proper divisors (193290426).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121257486 is an frugal number, since it uses more digits than its factorization.

121257486 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245 (or 121 counting only the distinct ones).

The product of its digits is 26880, while the sum is 36.

The square root of 121257486 is about 11011.6976892757. The cubic root of 121257486 is about 494.9593355025.

The spelling of 121257486 in words is "one hundred twenty-one million, two hundred fifty-seven thousand, four hundred eighty-six".