242031405 has 128 divisors (see below), whose sum is σ = 522547200. Its totient is φ = 92620800.

The previous prime is 242031401. The next prime is 242031409. The reversal of 242031405 is 504130242.

It is an interprime number because it is at equal distance from previous prime (242031401) and next prime (242031409).

It is not a de Polignac number, because 242031405 - 2² = 242031401 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242031401) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 899611 + ... + 899879.

It is an arithmetic number, because the mean of its divisors is an integer number (4082400).

Almost surely, 2^242031405 is an apocalyptic number.

It is an amenable number.

242031405 is an abundant number, since it is smaller than the sum of its proper divisors (280515795).

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

242031405 is a wasteful number, since it uses less digits than its factorization.

242031405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 355.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 242031405 is about 15557.3585482883. The cubic root of 242031405 is about 623.1949240066.

Adding to 242031405 its reverse (504130242), we get a palindrome (746161647).

The spelling of 242031405 in words is "two hundred forty-two million, thirty-one thousand, four hundred five".