1220492475 has 192 divisors, whose sum is σ = 2536980480. Its totient is φ = 572313600.

The previous prime is 1220492473. The next prime is 1220492477. The reversal of 1220492475 is 5742940221.

1220492475 is a `hidden beast` number, since 122 + 0 + 492 + 47 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (1220492473) and next prime (1220492477).

It is not a de Polignac number, because 1220492475 - 2¹ = 1220492473 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220492473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 16719039 + ... + 16719111.

It is an arithmetic number, because the mean of its divisors is an integer number (13213440).

Almost surely, 2^1220492475 is an apocalyptic number.

1220492475 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1220492475 is an abundant number, since it is smaller than the sum of its proper divisors (1316488005).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1220492475 is a wasteful number, since it uses less digits than its factorization.

1220492475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187 (or 176 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 1220492475 is about 34935.5474409662. The cubic root of 1220492475 is about 1068.6734879052.

The spelling of 1220492475 in words is "one billion, two hundred twenty million, four hundred ninety-two thousand, four hundred seventy-five".