402412042 has 4 divisors (see below), whose sum is σ = 603618066. Its totient is φ = 201206020.

The previous prime is 402412019. The next prime is 402412057. The reversal of 402412042 is 240214204.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 387735481 + 14676561 = 19691^2 + 3831^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100603009 + ... + 100603012.

Almost surely, 2^402412042 is an apocalyptic number.

402412042 is a deficient number, since it is larger than the sum of its proper divisors (201206024).

402412042 is a wasteful number, since it uses less digits than its factorization.

402412042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201206023.

The product of its (nonzero) digits is 512, while the sum is 19.

The square root of 402412042 is about 20060.2104176402. The cubic root of 402412042 is about 738.2843392367.

Adding to 402412042 its reverse (240214204), we get a palindrome (642626246).

The spelling of 402412042 in words is "four hundred two million, four hundred twelve thousand, forty-two".