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12490807 = 71784401
BaseRepresentation
bin101111101001…
…100000110111
3212111121011111
4233221200313
511144201212
61123415451
7211112230
oct57514067
925447144
1012490807
11706158a
124224587
132784514
141932087
15116aea7
hexbe9837

12490807 has 4 divisors (see below), whose sum is σ = 14275216. Its totient is φ = 10706400.

The previous prime is 12490783. The next prime is 12490813. The reversal of 12490807 is 70809421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70809421 = 431164291.

It is a cyclic number.

It is not a de Polignac number, because 12490807 - 211 = 12488759 is a prime.

It is a super-2 number, since 2×124908072 = 312040519022498, 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 (12490837) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 892194 + ... + 892207.

It is an arithmetic number, because the mean of its divisors is an integer number (3568804).

Almost surely, 212490807 is an apocalyptic number.

12490807 is a deficient number, since it is larger than the sum of its proper divisors (1784409).

12490807 is an equidigital number, since it uses as much as digits as its factorization.

12490807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1784408.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 12490807 is about 3534.2335802830. The cubic root of 12490807 is about 232.0225342262.

The spelling of 12490807 in words is "twelve million, four hundred ninety thousand, eight hundred seven".

Divisors: 1 7 1784401 12490807