402140142 has 24 divisors (see below), whose sum is σ = 909187344. Its totient is φ = 128218464.

The previous prime is 402140113. The next prime is 402140143. The reversal of 402140142 is 241041204.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402140143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 485263 + ... + 486090.

It is an arithmetic number, because the mean of its divisors is an integer number (37882806).

Almost surely, 2^402140142 is an apocalyptic number.

402140142 is an abundant number, since it is smaller than the sum of its proper divisors (507047202).

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

402140142 is a wasteful number, since it uses less digits than its factorization.

402140142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 971384 (or 971381 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 402140142 is about 20053.4321750667. The cubic root of 402140142 is about 738.1180215329.

Adding to 402140142 its reverse (241041204), we get a palindrome (643181346).

The spelling of 402140142 in words is "four hundred two million, one hundred forty thousand, one hundred forty-two".