49056721 has 4 divisors (see below), whose sum is σ = 56064832. Its totient is φ = 42048612.

The previous prime is 49056659. The next prime is 49056731. The reversal of 49056721 is 12765094.

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: 12765094 = 2 ⋅6382547.

It is a cyclic number.

It is not a de Polignac number, because 49056721 - 2¹⁷ = 48925649 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (49056731) 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, 3504045 + ... + 3504058.

It is an arithmetic number, because the mean of its divisors is an integer number (14016208).

Almost surely, 2^49056721 is an apocalyptic number.

It is an amenable number.

49056721 is a deficient number, since it is larger than the sum of its proper divisors (7008111).

49056721 is an equidigital number, since it uses as much as digits as its factorization.

49056721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7008110.

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 49056721 is about 7004.0503282030. The cubic root of 49056721 is about 366.0717134801.

The spelling of 49056721 in words is "forty-nine million, fifty-six thousand, seven hundred twenty-one".