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12690949 = 831071429
BaseRepresentation
bin110000011010…
…011000000101
3212212202201011
4300122120011
511222102244
61132002221
7212604565
oct60323005
925782634
1012690949
117188997
124300371
13282464b
141984da5
1511aa434
hexc1a605

12690949 has 8 divisors (see below), whose sum is σ = 12972960. Its totient is φ = 12412176.

The previous prime is 12690943. The next prime is 12690961. The reversal of 12690949 is 94909621.

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 12690949 - 23 = 12690941 is a prime.

It is a super-2 number, since 2×126909492 = 322120373041202, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12690941) 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, 8167 + ... + 9595.

It is an arithmetic number, because the mean of its divisors is an integer number (1621620).

Almost surely, 212690949 is an apocalyptic number.

It is an amenable number.

12690949 is a deficient number, since it is larger than the sum of its proper divisors (282011).

12690949 is a wasteful number, since it uses less digits than its factorization.

12690949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1619.

The product of its (nonzero) digits is 34992, while the sum is 40.

The square root of 12690949 is about 3562.4358239834. The cubic root of 12690949 is about 233.2552171616.

The spelling of 12690949 in words is "twelve million, six hundred ninety thousand, nine hundred forty-nine".

Divisors: 1 83 107 1429 8881 118607 152903 12690949