402641242 has 8 divisors (see below), whose sum is σ = 606554676. Its totient is φ = 200456352.

The previous prime is 402641233. The next prime is 402641269. The reversal of 402641242 is 242146204.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 394062201 + 8579041 = 19851^2 + 2929^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 431553 + ... + 432484.

Almost surely, 2^402641242 is an apocalyptic number.

402641242 is a deficient number, since it is larger than the sum of its proper divisors (203913434).

402641242 is a wasteful number, since it uses less digits than its factorization.

402641242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 864272.

The product of its (nonzero) digits is 3072, while the sum is 25.

The square root of 402641242 is about 20065.9224059100. The cubic root of 402641242 is about 738.4244797203.

Adding to 402641242 its reverse (242146204), we get a palindrome (644787446).

The spelling of 402641242 in words is "four hundred two million, six hundred forty-one thousand, two hundred forty-two".