1225427743 has 4 divisors (see below), whose sum is σ = 1289923960. Its totient is φ = 1160931528.

The previous prime is 1225427729. The next prime is 1225427747. The reversal of 1225427743 is 3477245221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3477245221 = 3119 ⋅1114859.

It is a cyclic number.

It is not a de Polignac number, because 1225427743 - 2¹⁷ = 1225296671 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225427747) 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, 32248080 + ... + 32248117.

It is an arithmetic number, because the mean of its divisors is an integer number (322480990).

Almost surely, 2^1225427743 is an apocalyptic number.

1225427743 is a deficient number, since it is larger than the sum of its proper divisors (64496217).

1225427743 is an equidigital number, since it uses as much as digits as its factorization.

1225427743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64496216.

The product of its digits is 94080, while the sum is 37.

The square root of 1225427743 is about 35006.1100809559. The cubic root of 1225427743 is about 1070.1120047541.

The spelling of 1225427743 in words is "one billion, two hundred twenty-five million, four hundred twenty-seven thousand, seven hundred forty-three".