351274921 has 4 divisors (see below), whose sum is σ = 359842644. Its totient is φ = 342707200.

The previous prime is 351274897. The next prime is 351274933. The reversal of 351274921 is 129472153.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 55056400 + 296218521 = 7420^2 + 17211^2 .

It is a cyclic number.

It is not a de Polignac number, because 351274921 - 2¹⁵ = 351242153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (351274951) 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 3 ways as a sum of consecutive naturals, for example, 4283800 + ... + 4283881.

It is an arithmetic number, because the mean of its divisors is an integer number (89960661).

Almost surely, 2^351274921 is an apocalyptic number.

It is an amenable number.

351274921 is a deficient number, since it is larger than the sum of its proper divisors (8567723).

351274921 is an equidigital number, since it uses as much as digits as its factorization.

351274921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8567722.

The product of its digits is 15120, while the sum is 34.

The square root of 351274921 is about 18742.3296577560. The cubic root of 351274921 is about 705.5845267107.

The spelling of 351274921 in words is "three hundred fifty-one million, two hundred seventy-four thousand, nine hundred twenty-one".