7440861 has 4 divisors (see below), whose sum is σ = 9921152. Its totient is φ = 4960572.

The previous prime is 7440859. The next prime is 7440863. The reversal of 7440861 is 1680447.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1680447 = 3 ⋅560149.

It is an interprime number because it is at equal distance from previous prime (7440859) and next prime (7440863).

It is not a de Polignac number, because 7440861 - 2¹ = 7440859 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a nialpdrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7440863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1240141 + ... + 1240146.

It is an arithmetic number, because the mean of its divisors is an integer number (2480288).

Almost surely, 2^7440861 is an apocalyptic number.

It is an amenable number.

7440861 is a deficient number, since it is larger than the sum of its proper divisors (2480291).

7440861 is a wasteful number, since it uses less digits than its factorization.

7440861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2480290.

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 7440861 is about 2727.7941637888. The cubic root of 7440861 is about 195.2275319073.

The spelling of 7440861 in words is "seven million, four hundred forty thousand, eight hundred sixty-one".