42025340 has 144 divisors (see below), whose sum is σ = 112805280. Its totient is φ = 13063680.

The previous prime is 42025331. The next prime is 42025349. The reversal of 42025340 is 4352024.

It is an interprime number because it is at equal distance from previous prime (42025331) and next prime (42025349).

It is a super-2 number, since 2×42025340² = 3532258404231200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42025349) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 688910 + ... + 688970.

It is an arithmetic number, because the mean of its divisors is an integer number (783370).

Almost surely, 2^42025340 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42025340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56402640).

42025340 is an abundant number, since it is smaller than the sum of its proper divisors (70779940).

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

42025340 is a wasteful number, since it uses less digits than its factorization.

42025340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140 (or 131 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 20.

The square root of 42025340 is about 6482.6954270581. The cubic root of 42025340 is about 347.6725571924.

Adding to 42025340 its reverse (4352024), we get a palindrome (46377364).

The spelling of 42025340 in words is "forty-two million, twenty-five thousand, three hundred forty".