42253261 has 8 divisors (see below), whose sum is σ = 43788600. Its totient is φ = 40723200.

The previous prime is 42253259. The next prime is 42253291. The reversal of 42253261 is 16235224.

It can be written as a sum of positive squares in 4 ways, for example, as 6791236 + 35462025 = 2606^2 + 5955^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42253261 - 2¹ = 42253259 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42253241) 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, 22561 + ... + 24361.

It is an arithmetic number, because the mean of its divisors is an integer number (5473575).

Almost surely, 2^42253261 is an apocalyptic number.

It is an amenable number.

42253261 is a deficient number, since it is larger than the sum of its proper divisors (1535339).

42253261 is a wasteful number, since it uses less digits than its factorization.

42253261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2639.

The product of its digits is 2880, while the sum is 25.

The square root of 42253261 is about 6500.2508413137. The cubic root of 42253261 is about 348.2999489282.

Adding to 42253261 its reverse (16235224), we get a palindrome (58488485).

The spelling of 42253261 in words is "forty-two million, two hundred fifty-three thousand, two hundred sixty-one".