1225342389 has 4 divisors (see below), whose sum is σ = 1633789856. Its totient is φ = 816894924.

The previous prime is 1225342381. The next prime is 1225342409. The reversal of 1225342389 is 9832435221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1225342389 - 2³ = 1225342381 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 (1225342381) 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, 204223729 + ... + 204223734.

It is an arithmetic number, because the mean of its divisors is an integer number (408447464).

Almost surely, 2^1225342389 is an apocalyptic number.

It is an amenable number.

1225342389 is a deficient number, since it is larger than the sum of its proper divisors (408447467).

1225342389 is an equidigital number, since it uses as much as digits as its factorization.

1225342389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408447466.

The product of its digits is 103680, while the sum is 39.

The square root of 1225342389 is about 35004.8909296972. The cubic root of 1225342389 is about 1070.0871588826.

The spelling of 1225342389 in words is "one billion, two hundred twenty-five million, three hundred forty-two thousand, three hundred eighty-nine".