978751225 has 9 divisors (see below), whose sum is σ = 1213845517. Its totient is φ = 782875840.

The previous prime is 978751201. The next prime is 978751229. The reversal of 978751225 is 522157879.

It is a happy number.

The square root of 978751225 is 31285.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 260725609 + 718025616 = 16147^2 + 26796^2 .

It is not a de Polignac number, because 978751225 - 2⁷ = 978751097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (978751229) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 153297 + ... + 159553.

Almost surely, 2^978751225 is an apocalyptic number.

978751225 is the 31285-th square number.

978751225 is the 15643-rd centered octagonal number.

It is an amenable number.

978751225 is a deficient number, since it is larger than the sum of its proper divisors (235094292).

978751225 is an frugal number, since it uses more digits than its factorization.

978751225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12524 (or 6262 counting only the distinct ones).

The product of its digits is 352800, while the sum is 46.

The cubic root of 978751225 is about 992.8663064262.

The spelling of 978751225 in words is "nine hundred seventy-eight million, seven hundred fifty-one thousand, two hundred twenty-five".