1225401943 has 8 divisors (see below), whose sum is σ = 1241628480. Its totient is φ = 1209193440.

The previous prime is 1225401937. The next prime is 1225401971. The reversal of 1225401943 is 3491045221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1225401943 - 2⁵ = 1225401911 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 (1225401043) 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 7 ways as a sum of consecutive naturals, for example, 182913 + ... + 189493.

It is an arithmetic number, because the mean of its divisors is an integer number (155203560).

Almost surely, 2^1225401943 is an apocalyptic number.

1225401943 is a deficient number, since it is larger than the sum of its proper divisors (16226537).

1225401943 is an equidigital number, since it uses as much as digits as its factorization.

1225401943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9017.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 1225401943 is about 35005.7415719193. The cubic root of 1225401943 is about 1070.1044947007.

The spelling of 1225401943 in words is "one billion, two hundred twenty-five million, four hundred one thousand, nine hundred forty-three".