99942405 has 32 divisors (see below), whose sum is σ = 169962624. Its totient is φ = 49975296.

The previous prime is 99942397. The next prime is 99942407. The reversal of 99942405 is 50424999.

It is not a de Polignac number, because 99942405 - 2³ = 99942397 is a prime.

It is a zygodrome in base 4.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99942407) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 85354 + ... + 86516.

It is an arithmetic number, because the mean of its divisors is an integer number (5311332).

Almost surely, 2^99942405 is an apocalyptic number.

It is an amenable number.

99942405 is a deficient number, since it is larger than the sum of its proper divisors (70020219).

99942405 is a wasteful number, since it uses less digits than its factorization.

99942405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1525.

The product of its (nonzero) digits is 116640, while the sum is 42.

The square root of 99942405 is about 9997.1198352325. The cubic root of 99942405 is about 464.0697554784.

The spelling of 99942405 in words is "ninety-nine million, nine hundred forty-two thousand, four hundred five".