2961509 has 4 divisors (see below), whose sum is σ = 3063660. Its totient is φ = 2859360.

The previous prime is 2961499. The next prime is 2961521. The reversal of 2961509 is 9051692.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 605284 + 2356225 = 778^2 + 1535^2 .

It is a cyclic number.

It is not a de Polignac number, because 2961509 - 2⁸ = 2961253 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 (2961589) 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, 51032 + ... + 51089.

It is an arithmetic number, because the mean of its divisors is an integer number (765915).

2^2961509 is an apocalyptic number.

2961509 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

2961509 is a deficient number, since it is larger than the sum of its proper divisors (102151).

2961509 is a wasteful number, since it uses less digits than its factorization.

2961509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102150.

The product of its (nonzero) digits is 4860, while the sum is 32.

The square root of 2961509 is about 1720.9035417478. The cubic root of 2961509 is about 143.6054819797.

The spelling of 2961509 in words is "two million, nine hundred sixty-one thousand, five hundred nine".