249075005 has 16 divisors (see below), whose sum is σ = 302628144. Its totient is φ = 196784640.

The previous prime is 249074999. The next prime is 249075011. The reversal of 249075005 is 500570942.

It is an interprime number because it is at equal distance from previous prime (249074999) and next prime (249075011).

It can be written as a sum of positive squares in 8 ways, for example, as 134606404 + 114468601 = 11602^2 + 10699^2 .

It is not a de Polignac number, because 249075005 - 2⁶ = 249074941 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 141209 + ... + 142961.

It is an arithmetic number, because the mean of its divisors is an integer number (18914259).

Almost surely, 2^249075005 is an apocalyptic number.

It is an amenable number.

249075005 is a deficient number, since it is larger than the sum of its proper divisors (53553139).

249075005 is a wasteful number, since it uses less digits than its factorization.

249075005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2096.

The product of its (nonzero) digits is 12600, while the sum is 32.

The square root of 249075005 is about 15782.1102834824. The cubic root of 249075005 is about 629.1826176289.

The spelling of 249075005 in words is "two hundred forty-nine million, seventy-five thousand, five".