1225558147 has 4 divisors (see below), whose sum is σ = 1336972536. Its totient is φ = 1114143760.

The previous prime is 1225558133. The next prime is 1225558153. The reversal of 1225558147 is 7418555221.

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

It is a cyclic number.

It is not a de Polignac number, because 1225558147 - 2¹¹ = 1225556099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1225558157) 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, 55707178 + ... + 55707199.

It is an arithmetic number, because the mean of its divisors is an integer number (334243134).

Almost surely, 2^1225558147 is an apocalyptic number.

1225558147 is a deficient number, since it is larger than the sum of its proper divisors (111414389).

1225558147 is a wasteful number, since it uses less digits than its factorization.

1225558147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111414388.

The product of its digits is 112000, while the sum is 40.

The square root of 1225558147 is about 35007.9726205332. The cubic root of 1225558147 is about 1070.1499620951.

The spelling of 1225558147 in words is "one billion, two hundred twenty-five million, five hundred fifty-eight thousand, one hundred forty-seven".