351406421 has 8 divisors (see below), whose sum is σ = 368690688. Its totient is φ = 334494000.

The previous prime is 351406417. The next prime is 351406441. The reversal of 351406421 is 124604153.

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 351406421 - 2² = 351406417 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (351406411) 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, 91025 + ... + 94806.

It is an arithmetic number, because the mean of its divisors is an integer number (46086336).

Almost surely, 2^351406421 is an apocalyptic number.

351406421 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

351406421 is a deficient number, since it is larger than the sum of its proper divisors (17284267).

351406421 is a wasteful number, since it uses less digits than its factorization.

351406421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185923.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 351406421 is about 18745.8374312806. The cubic root of 351406421 is about 705.6725610718.

The spelling of 351406421 in words is "three hundred fifty-one million, four hundred six thousand, four hundred twenty-one".