61228457 has 4 divisors (see below), whose sum is σ = 62721876. Its totient is φ = 59735040.

The previous prime is 61228429. The next prime is 61228459. The reversal of 61228457 is 75482216.

61228457 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1336336 + 59892121 = 1156^2 + 7739^2 .

It is a cyclic number.

It is not a de Polignac number, because 61228457 - 2¹⁶ = 61162921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61228459) 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, 746648 + ... + 746729.

It is an arithmetic number, because the mean of its divisors is an integer number (15680469).

Almost surely, 2^61228457 is an apocalyptic number.

It is an amenable number.

61228457 is a deficient number, since it is larger than the sum of its proper divisors (1493419).

61228457 is a wasteful number, since it uses less digits than its factorization.

61228457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1493418.

The product of its digits is 26880, while the sum is 35.

The square root of 61228457 is about 7824.8614684223. The cubic root of 61228457 is about 394.1405379586.

The spelling of 61228457 in words is "sixty-one million, two hundred twenty-eight thousand, four hundred fifty-seven".