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12492961 = 131576121
BaseRepresentation
bin101111101010…
…000010100001
3212111201010021
4233222002201
511144233321
61123433441
7211121425
oct57520241
925451107
1012492961
117063168
124225881
1327854b0
141932b85
15116b941
hexbea0a1

12492961 has 8 divisors (see below), whose sum is σ = 13541864. Its totient is φ = 11456640.

The previous prime is 12492959. The next prime is 12492967. The reversal of 12492961 is 16929421.

It can be written as a sum of positive squares in 4 ways, for example, as 207936 + 12285025 = 456^2 + 3505^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12492961 - 21 = 12492959 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12492967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1020 + ... + 5101.

It is an arithmetic number, because the mean of its divisors is an integer number (1692733).

Almost surely, 212492961 is an apocalyptic number.

12492961 is the 2041-st octagonal number.

It is an amenable number.

12492961 is a deficient number, since it is larger than the sum of its proper divisors (1048903).

12492961 is a wasteful number, since it uses less digits than its factorization.

12492961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6291.

The product of its digits is 7776, while the sum is 34.

The square root of 12492961 is about 3534.5383008252. The cubic root of 12492961 is about 232.0358706426.

The spelling of 12492961 in words is "twelve million, four hundred ninety-two thousand, nine hundred sixty-one".

Divisors: 1 13 157 2041 6121 79573 960997 12492961