402026142 has 16 divisors (see below), whose sum is σ = 918916992. Its totient is φ = 114864600.

The previous prime is 402026123. The next prime is 402026143. The reversal of 402026142 is 241620204.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402026143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4785984 + ... + 4786067.

It is an arithmetic number, because the mean of its divisors is an integer number (57432312).

Almost surely, 2^402026142 is an apocalyptic number.

402026142 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

402026142 is an abundant number, since it is smaller than the sum of its proper divisors (516890850).

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

402026142 is a wasteful number, since it uses less digits than its factorization.

402026142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9572063.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 402026142 is about 20050.5895673918. The cubic root of 402026142 is about 738.0482669058.

Adding to 402026142 its reverse (241620204), we get a palindrome (643646346).

The spelling of 402026142 in words is "four hundred two million, twenty-six thousand, one hundred forty-two".