49278451 has 4 divisors (see below), whose sum is σ = 49420000. Its totient is φ = 49136904.

The previous prime is 49278421. The next prime is 49278469. The reversal of 49278451 is 15487294.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15487294 = 2 ⋅7743647.

It is a cyclic number.

It is not a de Polignac number, because 49278451 - 2¹⁹ = 48754163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (49278421) 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, 70251 + ... + 70948.

It is an arithmetic number, because the mean of its divisors is an integer number (12355000).

Almost surely, 2^49278451 is an apocalyptic number.

49278451 is a deficient number, since it is larger than the sum of its proper divisors (141549).

49278451 is a wasteful number, since it uses less digits than its factorization.

49278451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141548.

The product of its digits is 80640, while the sum is 40.

The square root of 49278451 is about 7019.8611809636. The cubic root of 49278451 is about 366.6224167905.

It can be divided in two parts, 49278 and 451, that added together give a square (49729 = 223²).

The spelling of 49278451 in words is "forty-nine million, two hundred seventy-eight thousand, four hundred fifty-one".