2450721 has 32 divisors (see below), whose sum is σ = 4128768. Its totient is φ = 1258560.

The previous prime is 2450713. The next prime is 2450759. The reversal of 2450721 is 1270542.

2450721 is nontrivially palindromic in base 12.

It is not a de Polignac number, because 2450721 - 2³ = 2450713 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an Ulam number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2450711) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12736 + ... + 12926.

It is an arithmetic number, because the mean of its divisors is an integer number (129024).

2^2450721 is an apocalyptic number.

2450721 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2450721 is a deficient number, since it is larger than the sum of its proper divisors (1678047).

2450721 is a wasteful number, since it uses less digits than its factorization.

2450721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261.

The product of its (nonzero) digits is 560, while the sum is 21.

The square root of 2450721 is about 1565.4778823094. The cubic root of 2450721 is about 134.8231979084.

The spelling of 2450721 in words is "two million, four hundred fifty thousand, seven hundred twenty-one".