2621409 has 16 divisors (see below), whose sum is σ = 4088832. Its totient is φ = 1462608.

The previous prime is 2621387. The next prime is 2621431. The reversal of 2621409 is 9041262.

It is an interprime number because it is at equal distance from previous prime (2621387) and next prime (2621431).

It is not a de Polignac number, because 2621409 - 2⁹ = 2620897 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2621459) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 549 + ... + 2354.

It is an arithmetic number, because the mean of its divisors is an integer number (255552).

2^2621409 is an apocalyptic number.

It is an amenable number.

2621409 is a deficient number, since it is larger than the sum of its proper divisors (1467423).

2621409 is a wasteful number, since it uses less digits than its factorization.

2621409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2956.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 2621409 is about 1619.0765886764. The cubic root of 2621409 is about 137.8832766420.

The spelling of 2621409 in words is "two million, six hundred twenty-one thousand, four hundred nine".