978321251 has 8 divisors (see below), whose sum is σ = 1004285040. Its totient is φ = 952503552.

The previous prime is 978321241. The next prime is 978321263. The reversal of 978321251 is 152123879.

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 978321251 - 2⁶ = 978321187 is a prime.

It is a super-2 number, since 2×978321251² = 1914224940316410002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (978321221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22886 + ... + 49803.

It is an arithmetic number, because the mean of its divisors is an integer number (125535630).

Almost surely, 2^978321251 is an apocalyptic number.

978321251 is a deficient number, since it is larger than the sum of its proper divisors (25963789).

978321251 is a wasteful number, since it uses less digits than its factorization.

978321251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73045.

The product of its digits is 30240, while the sum is 38.

The square root of 978321251 is about 31278.1273576280. The cubic root of 978321251 is about 992.7208935041.

The spelling of 978321251 in words is "nine hundred seventy-eight million, three hundred twenty-one thousand, two hundred fifty-one".