265220142 has 48 divisors (see below), whose sum is σ = 588981456. Its totient is φ = 79552000.

The previous prime is 265220093. The next prime is 265220147. The reversal of 265220142 is 241022562.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (265220147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 71518 + ... + 75134.

It is an arithmetic number, because the mean of its divisors is an integer number (12270447).

Almost surely, 2^265220142 is an apocalyptic number.

265220142 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 265220142, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (294490728).

265220142 is an abundant number, since it is smaller than the sum of its proper divisors (323761314).

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

265220142 is a wasteful number, since it uses less digits than its factorization.

265220142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3745 (or 3734 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 265220142 is about 16285.5808002048. The cubic root of 265220142 is about 642.4936421320.

The spelling of 265220142 in words is "two hundred sixty-five million, two hundred twenty thousand, one hundred forty-two".