42915261 has 4 divisors (see below), whose sum is σ = 57220352. Its totient is φ = 28610172.

The previous prime is 42915251. The next prime is 42915329. The reversal of 42915261 is 16251924.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 42915261 - 2⁷ = 42915133 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42915211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7152541 + ... + 7152546.

It is an arithmetic number, because the mean of its divisors is an integer number (14305088).

Almost surely, 2^42915261 is an apocalyptic number.

It is an amenable number.

42915261 is a deficient number, since it is larger than the sum of its proper divisors (14305091).

42915261 is a wasteful number, since it uses less digits than its factorization.

42915261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14305090.

The product of its digits is 4320, while the sum is 30.

The square root of 42915261 is about 6550.9740497120. The cubic root of 42915261 is about 350.1095194679.

The spelling of 42915261 in words is "forty-two million, nine hundred fifteen thousand, two hundred sixty-one".