402140212 has 6 divisors (see below), whose sum is σ = 703745378. Its totient is φ = 201070104.

The previous prime is 402140197. The next prime is 402140213. The reversal of 402140212 is 212041204.

It can be written as a sum of positive squares in only one way, i.e., 262569616 + 139570596 = 16204^2 + 11814^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402140213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50267523 + ... + 50267530.

Almost surely, 2^402140212 is an apocalyptic number.

It is an amenable number.

402140212 is a deficient number, since it is larger than the sum of its proper divisors (301605166).

402140212 is a wasteful number, since it uses less digits than its factorization.

402140212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100535057 (or 100535055 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 402140212 is about 20053.4339204038. The cubic root of 402140212 is about 738.1180643607.

Adding to 402140212 its reverse (212041204), we get a palindrome (614181416).

The spelling of 402140212 in words is "four hundred two million, one hundred forty thousand, two hundred twelve".