121642623 has 12 divisors (see below), whose sum is σ = 175851208. Its totient is φ = 81028080.

The previous prime is 121642621. The next prime is 121642637. The reversal of 121642623 is 326246121.

121642623 is a `hidden beast` number, since 1 + 216 + 426 + 23 = 666.

It is not a de Polignac number, because 121642623 - 2¹ = 121642621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121642621) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7536 + ... + 17322.

Almost surely, 2^121642623 is an apocalyptic number.

121642623 is a deficient number, since it is larger than the sum of its proper divisors (54208585).

121642623 is a wasteful number, since it uses less digits than its factorization.

121642623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11174 (or 11171 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

The square root of 121642623 is about 11029.1714557350. The cubic root of 121642623 is about 495.4828102241.

Adding to 121642623 its reverse (326246121), we get a palindrome (447888744).

It can be divided in two parts, 121642 and 623, that added together give a triangular number (122265 = T₄₉₄).

The spelling of 121642623 in words is "one hundred twenty-one million, six hundred forty-two thousand, six hundred twenty-three".