1212745373 has 4 divisors (see below), whose sum is σ = 1385994720. Its totient is φ = 1039496028.

The previous prime is 1212745361. The next prime is 1212745427. The reversal of 1212745373 is 3735472121.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 3735472121 = 10247 ⋅364543.

It is a cyclic number.

It is not a de Polignac number, because 1212745373 - 2⁸ = 1212745117 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 (1212745333) 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, 86624663 + ... + 86624676.

It is an arithmetic number, because the mean of its divisors is an integer number (346498680).

Almost surely, 2^1212745373 is an apocalyptic number.

It is an amenable number.

1212745373 is a deficient number, since it is larger than the sum of its proper divisors (173249347).

1212745373 is an equidigital number, since it uses as much as digits as its factorization.

1212745373 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173249346.

The product of its digits is 35280, while the sum is 35.

The square root of 1212745373 is about 34824.4938656687. The cubic root of 1212745373 is about 1066.4075441644.

The spelling of 1212745373 in words is "one billion, two hundred twelve million, seven hundred forty-five thousand, three hundred seventy-three".