397212045 has 8 divisors (see below), whose sum is σ = 635539296. Its totient is φ = 211846416.

The previous prime is 397212037. The next prime is 397212071. The reversal of 397212045 is 540212793.

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

It is not a de Polignac number, because 397212045 - 2³ = 397212037 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 397211997 and 397212015.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13240387 + ... + 13240416.

It is an arithmetic number, because the mean of its divisors is an integer number (79442412).

Almost surely, 2^397212045 is an apocalyptic number.

It is an amenable number.

397212045 is a deficient number, since it is larger than the sum of its proper divisors (238327251).

397212045 is a wasteful number, since it uses less digits than its factorization.

397212045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26480811.

The product of its (nonzero) digits is 15120, while the sum is 33.

The square root of 397212045 is about 19930.1792515772. The cubic root of 397212045 is about 735.0904881882.

The spelling of 397212045 in words is "three hundred ninety-seven million, two hundred twelve thousand, forty-five".