265145430 has 128 divisors (see below), whose sum is σ = 742265856. Its totient is φ = 59904000.

The previous prime is 265145429. The next prime is 265145473. The reversal of 265145430 is 34541562.

265145430 = 1724² + 1725² + ... + 1808².

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 846954 + ... + 847266.

It is an arithmetic number, because the mean of its divisors is an integer number (5798952).

Almost surely, 2^265145430 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 265145430, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (371132928).

265145430 is an abundant number, since it is smaller than the sum of its proper divisors (477120426).

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

265145430 is a wasteful number, since it uses less digits than its factorization.

265145430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 502.

The product of its (nonzero) digits is 14400, while the sum is 30.

The square root of 265145430 is about 16283.2868303669. The cubic root of 265145430 is about 642.4333067283.

Adding to 265145430 its reverse (34541562), we get a palindrome (299686992).

The spelling of 265145430 in words is "two hundred sixty-five million, one hundred forty-five thousand, four hundred thirty".