7212429257 has 4 divisors (see below), whose sum is σ = 7868104656. Its totient is φ = 6556753860.

The previous prime is 7212429251. The next prime is 7212429271. The reversal of 7212429257 is 7529242127.

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 a cyclic number.

It is not a de Polignac number, because 7212429257 - 2¹⁶ = 7212363721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7212429251) 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, 327837683 + ... + 327837704.

It is an arithmetic number, because the mean of its divisors is an integer number (1967026164).

Almost surely, 2^7212429257 is an apocalyptic number.

It is an amenable number.

7212429257 is a deficient number, since it is larger than the sum of its proper divisors (655675399).

7212429257 is a wasteful number, since it uses less digits than its factorization.

7212429257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 655675398.

The product of its digits is 141120, while the sum is 41.

The square root of 7212429257 is about 84926.0222605533. The cubic root of 7212429257 is about 1932.0892707837.

The spelling of 7212429257 in words is "seven billion, two hundred twelve million, four hundred twenty-nine thousand, two hundred fifty-seven".