42499261 has 4 divisors (see below), whose sum is σ = 48570592. Its totient is φ = 36427932.

The previous prime is 42499243. The next prime is 42499271. The reversal of 42499261 is 16299424.

It is a happy number.

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 a cyclic number.

It is not a de Polignac number, because 42499261 - 2⁵ = 42499229 is a prime.

It is a super-2 number, since 2×42499261² = 3612374371092242, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 42499261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42499231) 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, 3035655 + ... + 3035668.

It is an arithmetic number, because the mean of its divisors is an integer number (12142648).

Almost surely, 2^42499261 is an apocalyptic number.

It is an amenable number.

42499261 is a deficient number, since it is larger than the sum of its proper divisors (6071331).

42499261 is an equidigital number, since it uses as much as digits as its factorization.

42499261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6071330.

The product of its digits is 31104, while the sum is 37.

The square root of 42499261 is about 6519.1457262436. The cubic root of 42499261 is about 348.9745796380.

The spelling of 42499261 in words is "forty-two million, four hundred ninety-nine thousand, two hundred sixty-one".