121661862 has 32 divisors (see below), whose sum is σ = 280960512. Its totient is φ = 34401024.

The previous prime is 121661857. The next prime is 121661863. The reversal of 121661862 is 268166121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121661863) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10858 + ... + 19005.

It is an arithmetic number, because the mean of its divisors is an integer number (8780016).

Almost surely, 2^121661862 is an apocalyptic number.

121661862 is an abundant number, since it is smaller than the sum of its proper divisors (159298650).

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

121661862 is a wasteful number, since it uses less digits than its factorization.

121661862 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29972.

The product of its digits is 6912, while the sum is 33.

The square root of 121661862 is about 11030.0436082547. The cubic root of 121661862 is about 495.5089307045.

It can be divided in two parts, 12166 and 1862, that added together give a triangular number (14028 = T₁₆₇).

The spelling of 121661862 in words is "one hundred twenty-one million, six hundred sixty-one thousand, eight hundred sixty-two".