42051402 has 12 divisors (see below), whose sum is σ = 91111410. Its totient is φ = 14017128.

The previous prime is 42051391. The next prime is 42051403. The reversal of 42051402 is 20415024.

It can be written as a sum of positive squares in only one way, i.e., 30902481 + 11148921 = 5559^2 + 3339^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 2336189 = 42051402 / (4 + 2 + 0 + 5 + 1 + 4 + 0 + 2).

It is not an unprimeable number, because it can be changed into a prime (42051403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1168077 + ... + 1168112.

Almost surely, 2^42051402 is an apocalyptic number.

42051402 is an abundant number, since it is smaller than the sum of its proper divisors (49060008).

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

42051402 is a wasteful number, since it uses less digits than its factorization.

42051402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2336197 (or 2336194 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 42051402 is about 6484.7052361692. The cubic root of 42051402 is about 347.7444120127.

Adding to 42051402 its reverse (20415024), we get a palindrome (62466426).

The spelling of 42051402 in words is "forty-two million, fifty-one thousand, four hundred two".